diff --git a/compiler/fir/fir2ir/jvm-backend/src/org/jetbrains/kotlin/fir/backend/jvm/FirJvmClassCodegen.kt b/compiler/fir/fir2ir/jvm-backend/src/org/jetbrains/kotlin/fir/backend/jvm/FirJvmClassCodegen.kt
index 3a37399afb2..70605448966 100644
--- a/compiler/fir/fir2ir/jvm-backend/src/org/jetbrains/kotlin/fir/backend/jvm/FirJvmClassCodegen.kt
+++ b/compiler/fir/fir2ir/jvm-backend/src/org/jetbrains/kotlin/fir/backend/jvm/FirJvmClassCodegen.kt
@@ -58,7 +58,7 @@ class FirJvmClassCodegen(
             symbol = FirAnonymousFunctionSymbol()
             returnTypeRef = function.returnTypeRef
             receiverTypeRef = function.receiverTypeRef
-            isLambda = false
+            isLambda = (function as? FirAnonymousFunction)?.isLambda == true
             valueParameters.addAll(function.valueParameters)
             typeParameters.addAll(function.typeParameters.filterIsInstance<FirTypeParameter>())
         }
diff --git a/compiler/testData/codegen/box/reflection/lambdaClasses/parameterNamesAndNullability.kt b/compiler/testData/codegen/box/reflection/lambdaClasses/parameterNamesAndNullability.kt
index 7dd88ebfb82..c8245ff9cc9 100644
--- a/compiler/testData/codegen/box/reflection/lambdaClasses/parameterNamesAndNullability.kt
+++ b/compiler/testData/codegen/box/reflection/lambdaClasses/parameterNamesAndNullability.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 // WITH_REFLECT