diff --git a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/ConeTypes.kt b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/ConeTypes.kt
index 33d2c46d9b3..3b3ba62197a 100644
--- a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/ConeTypes.kt
+++ b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/ConeTypes.kt
@@ -353,10 +353,25 @@ sealed class ConeStubType(val constructor: ConeStubTypeConstructor, override val
     }
 }
 
-open class ConeStubTypeForBuilderInference(variable: ConeTypeVariable, nullability: ConeNullability) :
-    ConeStubType(ConeStubTypeConstructor(variable, isTypeVariableInSubtyping = false), nullability)
-class ConeStubTypeForTypeVariableInSubtyping(variable: ConeTypeVariable, nullability: ConeNullability) :
-    ConeStubType(ConeStubTypeConstructor(variable, isTypeVariableInSubtyping = true), nullability)
+open class ConeStubTypeForBuilderInference(constructor: ConeStubTypeConstructor, nullability: ConeNullability) :
+    ConeStubType(constructor, nullability) {
+    constructor(variable: ConeTypeVariable, nullability: ConeNullability) : this(
+        ConeStubTypeConstructor(
+            variable,
+            isTypeVariableInSubtyping = false
+        ), nullability
+    )
+}
+
+class ConeStubTypeForTypeVariableInSubtyping(constructor: ConeStubTypeConstructor, nullability: ConeNullability) :
+    ConeStubType(constructor, nullability) {
+    constructor(variable: ConeTypeVariable, nullability: ConeNullability) : this(
+        ConeStubTypeConstructor(
+            variable,
+            isTypeVariableInSubtyping = true
+        ), nullability
+    )
+}
 
 open class ConeTypeVariable(name: String, originalTypeParameter: TypeParameterMarker? = null) : TypeVariableMarker {
     val typeConstructor = ConeTypeVariableTypeConstructor(name, originalTypeParameter)
diff --git a/compiler/fir/providers/src/org/jetbrains/kotlin/fir/types/TypeUtils.kt b/compiler/fir/providers/src/org/jetbrains/kotlin/fir/types/TypeUtils.kt
index a9267885004..db7d0bf334a 100644
--- a/compiler/fir/providers/src/org/jetbrains/kotlin/fir/types/TypeUtils.kt
+++ b/compiler/fir/providers/src/org/jetbrains/kotlin/fir/types/TypeUtils.kt
@@ -165,8 +165,8 @@ fun <T : ConeKotlinType> T.withNullability(
             ConeNullability.UNKNOWN -> this // TODO: is that correct?
             ConeNullability.NOT_NULL -> this
         }
-        is ConeStubTypeForBuilderInference -> ConeStubTypeForBuilderInference(constructor.variable, nullability)
-        is ConeStubTypeForTypeVariableInSubtyping -> ConeStubTypeForTypeVariableInSubtyping(constructor.variable, nullability)
+        is ConeStubTypeForBuilderInference -> ConeStubTypeForBuilderInference(constructor, nullability)
+        is ConeStubTypeForTypeVariableInSubtyping -> ConeStubTypeForTypeVariableInSubtyping(constructor, nullability)
         is ConeDefinitelyNotNullType -> when (nullability) {
             ConeNullability.NOT_NULL -> this
             ConeNullability.NULLABLE -> original.withNullability(nullability, typeContext)