diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt
index b4c894f6b64..7b3acaf9ea1 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt
@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl
 import org.jetbrains.kotlin.ir.declarations.persistent.PersistentIrFactory
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 import org.jetbrains.kotlin.ir.symbols.*
+import org.jetbrains.kotlin.ir.symbols.impl.DescriptorlessExternalPackageFragmentSymbol
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.types.impl.IrDynamicTypeImpl
 import org.jetbrains.kotlin.ir.util.*
@@ -62,34 +63,10 @@ class JsIrBackendContext(
     val externalPackageFragment = mutableMapOf<IrFileSymbol, IrFile>()
     val externalDeclarations = hashSetOf<IrDeclaration>()
 
-    @OptIn(ObsoleteDescriptorBasedAPI::class)
-    val bodilessBuiltInsPackageFragment: IrPackageFragment = run {
-
-        class DescriptorlessExternalPackageFragmentSymbol : IrExternalPackageFragmentSymbol {
-            override val descriptor: PackageFragmentDescriptor
-                get() = error("Operation is unsupported")
-
-            private var _owner: IrExternalPackageFragment? = null
-            override val owner get() = _owner!!
-
-            override val isPublicApi: Boolean
-                get() = TODO("Not yet implemented")
-
-            override val signature: IdSignature
-                get() = TODO("Not yet implemented")
-
-            override val isBound get() = _owner != null
-
-            override fun bind(owner: IrExternalPackageFragment) {
-                _owner = owner
-            }
-        }
-
-        IrExternalPackageFragmentImpl(
-            DescriptorlessExternalPackageFragmentSymbol(),
-            FqName("kotlin")
-        )
-    }
+    val bodilessBuiltInsPackageFragment: IrPackageFragment = IrExternalPackageFragmentImpl(
+        DescriptorlessExternalPackageFragmentSymbol(),
+        FqName("kotlin")
+    )
 
     val packageLevelJsModules = mutableSetOf<IrFile>()
     val declarationLevelJsModules = mutableListOf<IrDeclarationWithName>()
diff --git a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmBackendContext.kt b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmBackendContext.kt
index 065bf942167..ef7f4678a1f 100644
--- a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmBackendContext.kt
+++ b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmBackendContext.kt
@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrExternalPackageFragmentSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
+import org.jetbrains.kotlin.ir.symbols.impl.DescriptorlessExternalPackageFragmentSymbol
 import org.jetbrains.kotlin.ir.util.IdSignature
 import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.name.FqName
@@ -80,25 +81,4 @@ class WasmBackendContext(
         /*TODO*/
         print(message)
     }
-}
-
-class DescriptorlessExternalPackageFragmentSymbol : IrExternalPackageFragmentSymbol {
-    @ObsoleteDescriptorBasedAPI
-    override val descriptor: PackageFragmentDescriptor
-        get() = error("Operation is unsupported")
-
-    private var _owner: IrExternalPackageFragment? = null
-    override val owner get() = _owner!!
-
-    override val isBound get() = _owner != null
-
-    override fun bind(owner: IrExternalPackageFragment) {
-        _owner = owner
-    }
-
-    override val isPublicApi: Boolean
-        get() = error("Operation is unsupported")
-
-    override val signature: IdSignature
-        get() = error("Operation is unsupported")
-}
+}
\ No newline at end of file
diff --git a/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/symbols/impl/DescriptorlessExternalPackageFragmentSymbol.kt b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/symbols/impl/DescriptorlessExternalPackageFragmentSymbol.kt
new file mode 100644
index 00000000000..f436a6e7202
--- /dev/null
+++ b/compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/symbols/impl/DescriptorlessExternalPackageFragmentSymbol.kt
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.symbols.impl
+
+import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
+import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
+import org.jetbrains.kotlin.ir.declarations.IrExternalPackageFragment
+import org.jetbrains.kotlin.ir.symbols.IrExternalPackageFragmentSymbol
+import org.jetbrains.kotlin.ir.util.IdSignature
+
+@OptIn(ObsoleteDescriptorBasedAPI::class)
+class DescriptorlessExternalPackageFragmentSymbol : IrExternalPackageFragmentSymbol {
+    override val descriptor: PackageFragmentDescriptor
+        get() = error("Operation is unsupported")
+
+    private var _owner: IrExternalPackageFragment? = null
+    override val owner get() = _owner!!
+
+    override val isPublicApi: Boolean
+        get() = TODO("Not yet implemented")
+
+    override val signature: IdSignature
+        get() = TODO("Not yet implemented")
+
+    override val isBound get() = _owner != null
+
+    override fun bind(owner: IrExternalPackageFragment) {
+        _owner = owner
+    }
+}