diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt
index 181d7364795..a4a75ddc2a3 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt
@@ -500,7 +500,7 @@ class ClassCodegen private constructor(
                 it.origin == JvmLoweredDeclarationOrigin.CLASS_STATIC_INITIALIZER
             },
         ): ClassCodegen =
-            context.classCodegens.getOrPut(irClass) { ClassCodegen(irClass, context, parentFunction) }.also {
+            context.classCodegens.computeIfAbsent(irClass) { ClassCodegen(irClass, context, parentFunction) }.also {
                 assert(parentFunction == null || it.parentFunction == parentFunction) {
                     "inconsistent parent function for ${irClass.render()}:\n" +
                             "New: ${parentFunction!!.render()}\n" +