diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanDriver.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanDriver.kt
index f8d603f44bd..ad78da2e2da 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanDriver.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanDriver.kt
@@ -4,6 +4,7 @@ import org.jetbrains.kotlin.analyzer.AnalysisResult
 import org.jetbrains.kotlin.backend.konan.llvm.emitLLVM
 import org.jetbrains.kotlin.backend.konan.util.profile
 import org.jetbrains.kotlin.backend.konan.Context
+import org.jetbrains.kotlin.backend.konan.ir.ModuleIndex
 import org.jetbrains.kotlin.cli.common.CLICompiler
 import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
 import org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport
@@ -67,6 +68,7 @@ public fun runTopLevelPhases(konanConfig: KonanConfig, environment: KotlinCoreEn
     phaser.phase(KonanPhase.BACKEND) {
         phaser.phase(KonanPhase.LOWER) {
             KonanLower(context).lower()
+            context.ir.moduleIndexForCodegen = ModuleIndex(context.ir.irModule)
         }
         phaser.phase(KonanPhase.BITCODE) {
             emitLLVM(context)
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt
index 9e72f50942b..02ba74f77c3 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt
@@ -8,5 +8,7 @@ import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 internal class Ir(val context: Context, val irModule: IrModuleFragment) {
     val propertiesWithBackingFields = mutableSetOf<PropertyDescriptor>()
 
-    val moduleIndex = ModuleIndex(irModule)
+    val originalModuleIndex = ModuleIndex(irModule)
+
+    lateinit var moduleIndexForCodegen: ModuleIndex
 }
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/ContextUtils.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/ContextUtils.kt
index 16c1b28264c..fc0f65ee207 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/ContextUtils.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/ContextUtils.kt
@@ -75,7 +75,7 @@ internal interface ContextUtils {
             // In this function we check the presence of the backing filed
             // two ways: first we check IR, then we check the annotation.
 
-            val irClass = context.ir.moduleIndex.classes[this.classId]
+            val irClass = context.ir.moduleIndexForCodegen.classes[this.classId]
             if (irClass != null) {
                 val declarations = irClass.declarations
 
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt
index 4a2777441a3..fea79580d6f 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt
@@ -388,7 +388,7 @@ internal class CodeGeneratorVisitor(val context: Context) : IrElementVisitorVoid
                         LLVMSetInitializer(objectPtr, codegen.kNullObjHeaderPtr)
                     }
                 }
-                val irOfCurrentClass = context.ir.moduleIndex.classes[classDescriptor.classId]
+                val irOfCurrentClass = context.ir.moduleIndexForCodegen.classes[classDescriptor.classId]
                 irOfCurrentClass!!.acceptChildrenVoid(object : IrElementVisitorVoid {
                     override fun visitElement(element: IrElement) {
                         element.acceptChildrenVoid(this)
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt
index 4e0d9f7433e..533802e0b84 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionInlining.kt
@@ -24,7 +24,8 @@ internal class FunctionInlining(val context: Context): IrElementTransformerVoid(
         val functionDescriptor = expression.descriptor as FunctionDescriptor
         if (!functionDescriptor.isInline) return super.visitCall(expression)                // Function is not to be inlined - do nothing.
 
-        val functionDeclaration = context.ir.moduleIndex.functions[functionDescriptor]      // Get FunctionDeclaration by FunctionDescriptor.
+        val functionDeclaration = context.ir.originalModuleIndex
+                .functions[functionDescriptor]                                              // Get FunctionDeclaration by FunctionDescriptor.
         if (functionDeclaration == null) return super.visitCall(expression)                 // Function is declared in another module.
         val copyFuncDeclaration = functionDeclaration.accept(DeepCopyIrTree(), null) as IrFunction // Create copy of the function.