diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
index 2b0f2f49328..a5046e84937 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
@@ -892,7 +892,7 @@ class ExpressionCodegen(
                 // Use StringBuilder to concatenate.
                 AsmUtil.genStringBuilderConstructor(mv)
                 expression.arguments.forEach {
-                    val stackValue = gen(it, data)
+                    val stackValue = gen(it, it.asmType, data)
                     AsmUtil.genInvokeAppendMethod(mv, stackValue.type, stackValue.kotlinType)
                 }
                 mv.invokevirtual("java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false)
diff --git a/compiler/testData/codegen/box/dataClasses/unitComponent.kt b/compiler/testData/codegen/box/dataClasses/unitComponent.kt
index cb8a59a0da3..b70b461ab91 100644
--- a/compiler/testData/codegen/box/dataClasses/unitComponent.kt
+++ b/compiler/testData/codegen/box/dataClasses/unitComponent.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 data class A(val x: Unit)
 
 fun box(): String {