diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/JsGenerationContext.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/JsGenerationContext.kt
index 943e5f457f5..5445d190abc 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/JsGenerationContext.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/utils/JsGenerationContext.kt
@@ -27,7 +27,8 @@ class JsGenerationContext(
     val currentFile: IrFile,
     val currentFunction: IrFunction?,
     val staticContext: JsStaticContext,
-    val localNames: LocalNameGenerator? = null
+    val localNames: LocalNameGenerator? = null,
+    private val nameCache: MutableMap<IrElement, JsName> = mutableMapOf()
 ): IrNamer by staticContext {
     fun newFile(file: IrFile, func: IrFunction? = null, localNames: LocalNameGenerator? = null): JsGenerationContext {
         return JsGenerationContext(
@@ -35,9 +36,8 @@ class JsGenerationContext(
             currentFunction = func,
             staticContext = staticContext,
             localNames = localNames,
-        ).also {
-            it.nameCache += nameCache
-        }
+            nameCache = nameCache,
+        )
     }
 
     fun newDeclaration(func: IrFunction? = null, localNames: LocalNameGenerator? = null): JsGenerationContext {
@@ -46,13 +46,10 @@ class JsGenerationContext(
             currentFunction = func,
             staticContext = staticContext,
             localNames = localNames,
-        ).also {
-            it.nameCache += nameCache
-        }
+            nameCache = nameCache,
+        )
     }
 
-    private val nameCache = mutableMapOf<IrElement, JsName>()
-
     fun getNameForValueDeclaration(declaration: IrDeclarationWithName): JsName {
         return nameCache.getOrPut(declaration) {
             val name = localNames!!.variableNames.names[declaration]