diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt
index a620a4afdb0..7887beea575 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt
@@ -137,7 +137,7 @@ fun IrValueParameter.copyTo(
             (parent as IrTypeParametersContainer).classIfConstructor,
             irFunction.classIfConstructor
     ),
-    varargElementType: IrType? = this.varargElementType,
+    varargElementType: IrType? = this.varargElementType, // TODO: remapTypeParameters here as well
     defaultValue: IrExpressionBody? = this.defaultValue,
     isCrossinline: Boolean = this.isCrossinline,
     isNoinline: Boolean = this.isNoinline
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/PropertiesLowering.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/PropertiesLowering.kt
index 7e1ac6cad59..c7ae4c40975 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/PropertiesLowering.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/PropertiesLowering.kt
@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.backend.common.BackendContext
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.descriptors.WrappedSimpleFunctionDescriptor
 import org.jetbrains.kotlin.backend.common.ir.copyTo
+import org.jetbrains.kotlin.backend.common.ir.copyTypeParametersFrom
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.IrElement
@@ -19,7 +20,10 @@ import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrBlockBodyImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrBlockImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
+import org.jetbrains.kotlin.ir.types.classifierOrFail
+import org.jetbrains.kotlin.ir.types.typeWith
 import org.jetbrains.kotlin.ir.util.isEffectivelyExternal
+import org.jetbrains.kotlin.ir.util.render
 import org.jetbrains.kotlin.ir.util.transformDeclarationsFlat
 import org.jetbrains.kotlin.ir.visitors.*
 import org.jetbrains.kotlin.name.Name
@@ -81,7 +85,11 @@ class PropertiesLowering(
         ).apply {
             descriptor.bind(this)
 
-            extensionReceiverParameter = declaration.getter?.extensionReceiverParameter?.copyTo(this)
+            val extensionReceiver = declaration.getter?.extensionReceiverParameter
+            if (extensionReceiver != null) {
+                // Use raw type of extension receiver to avoid generic signature, which would be useless for this method.
+                extensionReceiverParameter = extensionReceiver.copyTo(this, type = extensionReceiver.type.classifierOrFail.typeWith())
+            }
 
             body = IrBlockBodyImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET)
 
diff --git a/compiler/testData/codegen/box/reflection/annotations/genericExtensionProperty.kt b/compiler/testData/codegen/box/reflection/annotations/genericExtensionProperty.kt
new file mode 100644
index 00000000000..ba05011d5b5
--- /dev/null
+++ b/compiler/testData/codegen/box/reflection/annotations/genericExtensionProperty.kt
@@ -0,0 +1,16 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Simple(val value: String)
+
+interface A<T>
+
+@Simple("OK")
+public val <T> A<T>.p: String
+    get() = TODO()
+
+fun box(): String {
+    val o = object : A<Int> {}
+    return (o::p.annotations.single() as Simple).value
+}
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index abab992e723..368083939b1 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -20301,6 +20301,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt");
             }
 
+            @TestMetadata("genericExtensionProperty.kt")
+            public void testGenericExtensionProperty() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/annotations/genericExtensionProperty.kt");
+            }
+
             @TestMetadata("hasAnnotation.kt")
             public void testHasAnnotation() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 665219d5cc9..5988f64177b 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -20301,6 +20301,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt");
             }
 
+            @TestMetadata("genericExtensionProperty.kt")
+            public void testGenericExtensionProperty() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/annotations/genericExtensionProperty.kt");
+            }
+
             @TestMetadata("hasAnnotation.kt")
             public void testHasAnnotation() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index 34dd73c2f44..0745636b55a 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -19186,6 +19186,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt");
             }
 
+            @TestMetadata("genericExtensionProperty.kt")
+            public void testGenericExtensionProperty() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/annotations/genericExtensionProperty.kt");
+            }
+
             @TestMetadata("hasAnnotation.kt")
             public void testHasAnnotation() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt");