diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/UsefulDeclarationProcessor.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/UsefulDeclarationProcessor.kt
index ec61c7aab19..48b6c584353 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/UsefulDeclarationProcessor.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/dce/UsefulDeclarationProcessor.kt
@@ -57,10 +57,7 @@ abstract class UsefulDeclarationProcessor(
             super.visitBlock(expression, data)
 
             if (expression is IrReturnableBlock) {
-                // We need to extract `originalFunction` here because saved `inlineFunction`
-                // is actually a copy made in `SaveInlineFunctionsBeforeInlining`.
-                // Without this, we are not going to find proper intersection in the `saveOnlyIntersectionOfNextDeclarationsFor` method.
-                expression.inlineFunction?.originalFunction?.addToUsefulPolyfilledDeclarations()
+                expression.inlineFunction?.addToUsefulPolyfilledDeclarations()
             }
         }
 
diff --git a/compiler/ir/ir.inline/src/org/jetbrains/kotlin/ir/inline/FunctionInlining.kt b/compiler/ir/ir.inline/src/org/jetbrains/kotlin/ir/inline/FunctionInlining.kt
index 17c2900bf45..936f43330df 100644
--- a/compiler/ir/ir.inline/src/org/jetbrains/kotlin/ir/inline/FunctionInlining.kt
+++ b/compiler/ir/ir.inline/src/org/jetbrains/kotlin/ir/inline/FunctionInlining.kt
@@ -162,7 +162,7 @@ class FunctionInlining(
 
         val substituteMap = mutableMapOf<IrValueParameter, IrExpression>()
 
-        fun inline() = inlineFunction(callSite, callee, callee, true)
+        fun inline() = inlineFunction(callSite, callee, callee.originalFunction, true)
 
         private fun <E : IrElement> E.copy(): E {
             @Suppress("UNCHECKED_CAST")