diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/JsUsefulDeclarationProcessor.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/JsUsefulDeclarationProcessor.kt
index 8d4185b1b9c48..6350cf9f825a5 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/JsUsefulDeclarationProcessor.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/JsUsefulDeclarationProcessor.kt
@@ -71,7 +71,7 @@ internal class JsUsefulDeclarationProcessor(
                 }
 
                 context.reflectionSymbols.getKClass -> {
-                    addConstructedClass(expression.getTypeArgument(0)!!.classifierOrFail.owner as IrClass)
+                    expression.getTypeArgument(0)?.classOrNull?.owner?.let(::addConstructedClass)
                 }
 
                 context.intrinsics.jsObjectCreateSymbol -> {