diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt
index b618818ea94..eef290d7361 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/generators/DelegatedMemberGenerator.kt
@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrGetFieldImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrReturnImpl
 import org.jetbrains.kotlin.ir.types.classifierOrNull
+import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
 import org.jetbrains.kotlin.ir.types.isNothing
 import org.jetbrains.kotlin.ir.types.isUnit
 import org.jetbrains.kotlin.name.ClassId
@@ -202,6 +203,16 @@ class DelegatedMemberGenerator(
             delegateFunction.valueParameters.forEach {
                 putValueArgument(it.index, IrGetValueImpl(startOffset, endOffset, it.type, it.symbol))
             }
+            superFunction.typeParameters.forEach {
+                putTypeArgument(
+                    it.index, IrSimpleTypeImpl(
+                        delegateFunction.typeParameters[it.index].symbol,
+                        hasQuestionMark = false,
+                        arguments = emptyList(),
+                        annotations = emptyList()
+                    )
+                )
+            }
         }
         if (superFunction.returnType.isUnit() || superFunction.returnType.isNothing()) {
             body.statements.add(irCall)
diff --git a/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.ir.txt b/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.ir.txt
index b88faf4c614..3d4a764b356 100644
--- a/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.ir.txt
+++ b/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.ir.txt
@@ -55,7 +55,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
       VALUE_PARAMETER name:b index:1 type:B of <root>.Test1.foo
       BLOCK_BODY
         CALL 'public abstract fun foo <B> (a: A of <root>.IBase, b: B of <root>.IBase.foo): kotlin.Unit declared in <root>.IBase' type=kotlin.Unit origin=null
-          <B>: <none>
+          <B>: B of <root>.Test1.foo
           $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<E of <root>.Test1> visibility:local [final]' type=<root>.IBase<E of <root>.Test1> origin=null
             receiver: GET_VAR '<this>: <root>.Test1<E of <root>.Test1> declared in <root>.Test1.foo' type=<root>.Test1<E of <root>.Test1> origin=null
           a: GET_VAR 'a: E of <root>.Test1 declared in <root>.Test1.foo' type=E of <root>.Test1 origin=null
@@ -73,7 +73,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public open fun <get-id> <C> (): kotlin.collections.Map<E of <root>.Test1, C of <root>.Test1.<get-id>>? declared in <root>.Test1'
             CALL 'public abstract fun <get-id> <C> (): kotlin.collections.Map<A of <root>.IBase, C of <root>.IBase.<get-id>>? declared in <root>.IBase' type=kotlin.collections.Map<E of <root>.Test1, C of <root>.Test1.<get-id>>? origin=null
-              <C>: <none>
+              <C>: C of <root>.Test1.<get-id>
               $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<E of <root>.Test1> visibility:local [final]' type=<root>.IBase<E of <root>.Test1> origin=null
                 receiver: GET_VAR '<this>: <root>.Test1<E of <root>.Test1> declared in <root>.Test1.<get-id>' type=<root>.Test1<E of <root>.Test1> origin=null
               $receiver: GET_VAR '<this>: C of <root>.Test1.<get-id> declared in <root>.Test1.<get-id>' type=C of <root>.Test1.<get-id> origin=null
@@ -90,7 +90,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public open fun <get-x> <D> (): D of <root>.Test1.<get-x>? declared in <root>.Test1'
             CALL 'public abstract fun <get-x> <D> (): D of <root>.IBase.<get-x>? declared in <root>.IBase' type=D of <root>.Test1.<get-x>? origin=null
-              <D>: <none>
+              <D>: D of <root>.Test1.<get-x>
               $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<E of <root>.Test1> visibility:local [final]' type=<root>.IBase<E of <root>.Test1> origin=null
                 receiver: GET_VAR '<this>: <root>.Test1<E of <root>.Test1> declared in <root>.Test1.<get-x>' type=<root>.Test1<E of <root>.Test1> origin=null
               $receiver: GET_VAR '<this>: kotlin.collections.List<D of <root>.Test1.<get-x>> declared in <root>.Test1.<get-x>' type=kotlin.collections.List<D of <root>.Test1.<get-x>> origin=null
@@ -104,7 +104,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
         VALUE_PARAMETER name:<set-?> index:0 type:D of <root>.Test1.<set-x>?
         BLOCK_BODY
           CALL 'public abstract fun <set-x> <D> (<set-?>: D of <root>.IBase.<set-x>?): kotlin.Unit declared in <root>.IBase' type=kotlin.Unit origin=null
-            <D>: <none>
+            <D>: D of <root>.Test1.<set-x>
             $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<E of <root>.Test1> visibility:local [final]' type=<root>.IBase<E of <root>.Test1> origin=null
               receiver: GET_VAR '<this>: <root>.Test1<E of <root>.Test1> declared in <root>.Test1.<set-x>' type=<root>.Test1<E of <root>.Test1> origin=null
             $receiver: GET_VAR '<this>: kotlin.collections.List<D of <root>.Test1.<get-x>> declared in <root>.Test1.<set-x>' type=kotlin.collections.List<D of <root>.Test1.<get-x>> origin=null
@@ -141,7 +141,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
       VALUE_PARAMETER name:b index:1 type:B of <root>.Test2.foo
       BLOCK_BODY
         CALL 'public abstract fun foo <B> (a: A of <root>.IBase, b: B of <root>.IBase.foo): kotlin.Unit declared in <root>.IBase' type=kotlin.Unit origin=null
-          <B>: <none>
+          <B>: B of <root>.Test2.foo
           $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<kotlin.String> visibility:local [final]' type=<root>.IBase<kotlin.String> origin=null
             receiver: GET_VAR '<this>: <root>.Test2 declared in <root>.Test2.foo' type=<root>.Test2 origin=null
           a: GET_VAR 'a: kotlin.String declared in <root>.Test2.foo' type=kotlin.String origin=null
@@ -159,7 +159,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public open fun <get-id> <C> (): kotlin.collections.Map<kotlin.String, C of <root>.Test2.<get-id>>? declared in <root>.Test2'
             CALL 'public abstract fun <get-id> <C> (): kotlin.collections.Map<A of <root>.IBase, C of <root>.IBase.<get-id>>? declared in <root>.IBase' type=kotlin.collections.Map<kotlin.String, C of <root>.Test2.<get-id>>? origin=null
-              <C>: <none>
+              <C>: C of <root>.Test2.<get-id>
               $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<kotlin.String> visibility:local [final]' type=<root>.IBase<kotlin.String> origin=null
                 receiver: GET_VAR '<this>: <root>.Test2 declared in <root>.Test2.<get-id>' type=<root>.Test2 origin=null
               $receiver: GET_VAR '<this>: C of <root>.Test2.<get-id> declared in <root>.Test2.<get-id>' type=C of <root>.Test2.<get-id> origin=null
@@ -176,7 +176,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public open fun <get-x> <D> (): D of <root>.Test2.<get-x>? declared in <root>.Test2'
             CALL 'public abstract fun <get-x> <D> (): D of <root>.IBase.<get-x>? declared in <root>.IBase' type=D of <root>.Test2.<get-x>? origin=null
-              <D>: <none>
+              <D>: D of <root>.Test2.<get-x>
               $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<kotlin.String> visibility:local [final]' type=<root>.IBase<kotlin.String> origin=null
                 receiver: GET_VAR '<this>: <root>.Test2 declared in <root>.Test2.<get-x>' type=<root>.Test2 origin=null
               $receiver: GET_VAR '<this>: kotlin.collections.List<D of <root>.Test2.<get-x>> declared in <root>.Test2.<get-x>' type=kotlin.collections.List<D of <root>.Test2.<get-x>> origin=null
@@ -190,7 +190,7 @@ FILE fqName:<root> fileName:/delegatedGenericImplementation.kt
         VALUE_PARAMETER name:<set-?> index:0 type:D of <root>.Test2.<set-x>?
         BLOCK_BODY
           CALL 'public abstract fun <set-x> <D> (<set-?>: D of <root>.IBase.<set-x>?): kotlin.Unit declared in <root>.IBase' type=kotlin.Unit origin=null
-            <D>: <none>
+            <D>: D of <root>.Test2.<set-x>
             $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<kotlin.String> visibility:local [final]' type=<root>.IBase<kotlin.String> origin=null
               receiver: GET_VAR '<this>: <root>.Test2 declared in <root>.Test2.<set-x>' type=<root>.Test2 origin=null
             $receiver: GET_VAR '<this>: kotlin.collections.List<D of <root>.Test2.<get-x>> declared in <root>.Test2.<set-x>' type=kotlin.collections.List<D of <root>.Test2.<get-x>> origin=null
diff --git a/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.kt.txt b/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.kt.txt
index 9f16438211d..25803ef7550 100644
--- a/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.kt.txt
+++ b/compiler/testData/ir/irText/classes/delegatedGenericImplementation.fir.kt.txt
@@ -17,20 +17,20 @@ class Test1<E : Any?> : IBase<E> {
   }
 
   override fun <B : Any?> foo(a: E, b: B) {
-    <this>.#<$$delegate_0>.foo</* null */>(a = a, b = b)
+    <this>.#<$$delegate_0>.foo<B>(a = a, b = b)
   }
 
   override val <C : Any?> C.id: Map<E, C>?
     override get(): Map<E, C>? {
-      return (<this>.#<$$delegate_0>, <this>).<get-id></* null */>()
+      return (<this>.#<$$delegate_0>, <this>).<get-id><C>()
     }
 
   override var <D : Any?> List<D>.x: D?
     override get(): D? {
-      return (<this>.#<$$delegate_0>, <this>).<get-x></* null */>()
+      return (<this>.#<$$delegate_0>, <this>).<get-x><D>()
     }
     override set(<set-?>: D?) {
-      (<this>.#<$$delegate_0>, <this>).<set-x></* null */>(<set-?> = <set-?>)
+      (<this>.#<$$delegate_0>, <this>).<set-x><D>(<set-?> = <set-?>)
     }
 
   local /* final field */ val <$$delegate_0>: IBase<E> = i
@@ -45,20 +45,20 @@ class Test2 : IBase<String> {
   }
 
   override fun <B : Any?> foo(a: String, b: B) {
-    <this>.#<$$delegate_0>.foo</* null */>(a = a, b = b)
+    <this>.#<$$delegate_0>.foo<B>(a = a, b = b)
   }
 
   override val <C : Any?> C.id: Map<String, C>?
     override get(): Map<String, C>? {
-      return (<this>.#<$$delegate_0>, <this>).<get-id></* null */>()
+      return (<this>.#<$$delegate_0>, <this>).<get-id><C>()
     }
 
   override var <D : Any?> List<D>.x: D?
     override get(): D? {
-      return (<this>.#<$$delegate_0>, <this>).<get-x></* null */>()
+      return (<this>.#<$$delegate_0>, <this>).<get-x><D>()
     }
     override set(<set-?>: D?) {
-      (<this>.#<$$delegate_0>, <this>).<set-x></* null */>(<set-?> = <set-?>)
+      (<this>.#<$$delegate_0>, <this>).<set-x><D>(<set-?> = <set-?>)
     }
 
   local /* final field */ val <$$delegate_0>: IBase<String> = j
diff --git a/compiler/testData/ir/irText/classes/kt45934.fir.ir.txt b/compiler/testData/ir/irText/classes/kt45934.fir.ir.txt
index 595be85c87a..e0397a83172 100644
--- a/compiler/testData/ir/irText/classes/kt45934.fir.ir.txt
+++ b/compiler/testData/ir/irText/classes/kt45934.fir.ir.txt
@@ -14,7 +14,7 @@ FILE fqName:<root> fileName:/kt45934.kt
       BLOCK_BODY
         RETURN type=kotlin.Nothing from='public open fun foo <C> (): @[FlexibleNullability] kotlin.collections.List<@[FlexibleNullability] C of <root>.C.foo?>? declared in <root>.C'
           CALL 'public abstract fun foo <C> (): @[FlexibleNullability] kotlin.collections.List<@[FlexibleNullability] C of <root>.I.foo?>? declared in <root>.I' type=@[FlexibleNullability] kotlin.collections.List<@[FlexibleNullability] C of <root>.C.foo?>? origin=null
-            <C>: <none>
+            <C>: C of <root>.C.foo
             $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.I visibility:local [final]' type=<root>.I origin=null
               receiver: GET_VAR '<this>: <root>.C declared in <root>.C.foo' type=<root>.C origin=null
     FIELD DELEGATE name:<$$delegate_0> type:<root>.I visibility:local [final]
diff --git a/compiler/testData/ir/irText/declarations/kt35550.fir.ir.txt b/compiler/testData/ir/irText/declarations/kt35550.fir.ir.txt
index 53fac91195b..8946df8e6d0 100644
--- a/compiler/testData/ir/irText/declarations/kt35550.fir.ir.txt
+++ b/compiler/testData/ir/irText/declarations/kt35550.fir.ir.txt
@@ -43,7 +43,7 @@ FILE fqName:<root> fileName:/kt35550.kt
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public open fun <get-id> <T> (): T of <root>.A.<get-id> declared in <root>.A'
             CALL 'public open fun <get-id> <T> (): T of <root>.I.<get-id> declared in <root>.I' type=T of <root>.A.<get-id> origin=null
-              <T>: <none>
+              <T>: T of <root>.A.<get-id>
               $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.I visibility:local [final]' type=<root>.I origin=null
                 receiver: GET_VAR '<this>: <root>.A declared in <root>.A.<get-id>' type=<root>.A origin=null
               $receiver: GET_VAR '<this>: T of <root>.A.<get-id> declared in <root>.A.<get-id>' type=T of <root>.A.<get-id> origin=null
diff --git a/compiler/testData/ir/irText/declarations/kt35550.fir.kt.txt b/compiler/testData/ir/irText/declarations/kt35550.fir.kt.txt
index 1e4aa765a55..a8da794e1c7 100644
--- a/compiler/testData/ir/irText/declarations/kt35550.fir.kt.txt
+++ b/compiler/testData/ir/irText/declarations/kt35550.fir.kt.txt
@@ -15,7 +15,7 @@ class A : I {
 
   override val <T : Any?> T.id: T
     override get(): T {
-      return (<this>.#<$$delegate_0>, <this>).<get-id></* null */>()
+      return (<this>.#<$$delegate_0>, <this>).<get-id><T>()
     }
 
   local /* final field */ val <$$delegate_0>: I = i
diff --git a/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.ir.txt b/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.ir.txt
index ae7cb163774..fd032ea4022 100644
--- a/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.ir.txt
+++ b/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.ir.txt
@@ -54,7 +54,7 @@ FILE fqName:<root> fileName:/delegatedMembers.kt
       VALUE_PARAMETER name:x index:1 type:X of <root>.Test.qux
       BLOCK_BODY
         CALL 'public abstract fun qux <X> (t: T of <root>.IBase, x: X of <root>.IBase.qux): kotlin.Unit declared in <root>.IBase' type=kotlin.Unit origin=null
-          <X>: <none>
+          <X>: X of <root>.Test.qux
           $this: GET_FIELD 'FIELD DELEGATE name:<$$delegate_0> type:<root>.IBase<TT of <root>.Test> visibility:local [final]' type=<root>.IBase<TT of <root>.Test> origin=null
             receiver: GET_VAR '<this>: <root>.Test<TT of <root>.Test> declared in <root>.Test.qux' type=<root>.Test<TT of <root>.Test> origin=null
           t: GET_VAR 't: TT of <root>.Test declared in <root>.Test.qux' type=TT of <root>.Test origin=null
diff --git a/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.kt.txt b/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.kt.txt
index 85126984874..c8ffbebf8be 100644
--- a/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.kt.txt
+++ b/compiler/testData/ir/irText/declarations/parameters/delegatedMembers.fir.kt.txt
@@ -19,7 +19,7 @@ class Test<TT : Any?> : IBase<TT> {
   }
 
   override fun <X : Any?> qux(t: TT, x: X) {
-    <this>.#<$$delegate_0>.qux</* null */>(t = t, x = x)
+    <this>.#<$$delegate_0>.qux<X>(t = t, x = x)
   }
 
   override val bar: Int