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 f27a06a5e79..2d63a567e65 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
@@ -119,6 +119,7 @@ object JsIrBuilder {
         isTailrec: Boolean = false,
         isSuspend: Boolean = false,
         isExpect: Boolean = false,
+        isOperator: Boolean = false,
         origin: IrDeclarationOrigin = SYNTHESIZED_DECLARATION
     ): IrSimpleFunction {
         val descriptor = WrappedSimpleFunctionDescriptor()
@@ -136,7 +137,8 @@ object JsIrBuilder {
             isTailrec = isTailrec,
             isSuspend = isSuspend,
             isExpect = isExpect,
-            isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
+            isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
+            isOperator = isOperator
         ).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 230b0491a0c..6cde2f70ef1 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 +104,8 @@ 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, isFakeOverride = false
+            isInline = false, isExternal = false, isTailrec = false, isSuspend = false, isExpect = false, isFakeOverride = false,
+            isOperator = 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 36d47c17ad6..769e55ed75d 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
@@ -195,7 +195,8 @@ class PrivateMembersLowering(val context: JsIrBackendContext) : FileLoweringPass
                     symbol, name, visibility, modality,
                     returnType,
                     isInline = isInline, isExternal = isExternal, isTailrec = isTailrec, isSuspend = isSuspend, isExpect = isExpect,
-                    isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE
+                    isFakeOverride = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
+                    isOperator = isOperator
                 ).also {
                     descriptor.bind(it)
                     it.parent = parent