diff --git a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazyConstructor.kt b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazyConstructor.kt
index 53b89cd1cd3..370935e3ab2 100644
--- a/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazyConstructor.kt
+++ b/compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazyConstructor.kt
@@ -94,11 +94,7 @@ class Fir2IrLazyConstructor(
         } else null
     }
 
-    override var extensionReceiverParameter: IrValueParameter?
-        get() = null
-        set(_) {
-            error("Mutating Fir2Ir lazy elements is not possible")
-        }
+    override var extensionReceiverParameter: IrValueParameter? = null
 
     override var contextReceiverParametersCount: Int = fir.contextReceivers.size