diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrBuilder.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrBuilder.kt
index 636d4f02437..6fe4dcd63d9 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrBuilder.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrBuilder.kt
@@ -136,7 +136,8 @@ object JsIrBuilder {
             isExternal = isExternal,
             isTailrec = isTailrec,
             isSuspend = isSuspend,
-            isExpect = isExpect
+            isExpect = isExpect,
+            isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
         ).also {
             descriptor.bind(it)
             it.parent = parent
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/CreateScriptFunctionsPhase.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/CreateScriptFunctionsPhase.kt
index 93661acd34e..3fdd97c4f3c 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/CreateScriptFunctionsPhase.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/CreateScriptFunctionsPhase.kt
@@ -104,7 +104,7 @@ class CreateScriptFunctionsPhase(val context: CommonBackendContext) : FileLoweri
             IrSimpleFunctionSymbolImpl(descriptor),
             Name.identifier(name),
             Visibilities.PRIVATE, Modality.FINAL, returnType,
-            isInline = false, isExternal = false, isTailrec = false, isSuspend = false, isExpect = false
+            isInline = false, isExternal = false, isTailrec = false, isSuspend = false, isExpect = false, isFakeOverride = false
         ).also {
             descriptor.bind(it)
             it.parent = irScript
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrivateMembersLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrivateMembersLowering.kt
index 61606511cfa..d46c6d4595b 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrivateMembersLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrivateMembersLowering.kt
@@ -163,7 +163,8 @@ class PrivateMembersLowering(val context: JsIrBackendContext) : FileLoweringPass
                 startOffset, endOffset, origin,
                 symbol, name, visibility, modality,
                 returnType,
-                isInline = isInline, isExternal = isExternal, isTailrec = isTailrec, isSuspend = isSuspend, isExpect = isExpect
+                isInline = isInline, isExternal = isExternal, isTailrec = isTailrec, isSuspend = isSuspend, isExpect = isExpect,
+                isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
             ).also {
                 descriptor.bind(it)
                 it.parent = parent