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 48b6c584353..ec61c7aab19 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
@@ -57,7 +57,10 @@ abstract class UsefulDeclarationProcessor(
             super.visitBlock(expression, data)
 
             if (expression is IrReturnableBlock) {
-                expression.inlineFunction?.addToUsefulPolyfilledDeclarations()
+                // 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()
             }
         }
 
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 8882d90b004..65ecd6abecb 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
@@ -123,7 +123,7 @@ class FunctionInlining(
             ?: containerScope?.irElement as? IrDeclarationParent
             ?: (containerScope?.irElement as? IrDeclaration)?.parent
 
-        val inliner = Inliner(expression, actualCallee, target, currentScope ?: containerScope!!, parent, context)
+        val inliner = Inliner(expression, actualCallee, currentScope ?: containerScope!!, parent, context)
         return inliner.inline().markAsRegenerated()
     }
 
@@ -149,7 +149,6 @@ class FunctionInlining(
     private inner class Inliner(
         val callSite: IrFunctionAccessExpression,
         val callee: IrFunction,
-        val originalCallee: IrFunction,
         val currentScope: ScopeWithIr,
         val parent: IrDeclarationParent?,
         val context: CommonBackendContext
@@ -169,7 +168,7 @@ class FunctionInlining(
 
         val substituteMap = mutableMapOf<IrValueParameter, IrExpression>()
 
-        fun inline() = inlineFunction(callSite, callee, originalCallee, true)
+        fun inline() = inlineFunction(callSite, callee, callee, true)
 
         private fun <E : IrElement> E.copy(): E {
             @Suppress("UNCHECKED_CAST")