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 b89786c1119..5fee4856486 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
@@ -1261,7 +1261,7 @@ internal class CodeGeneratorVisitor(val context: Context, val lifetimes: Map<IrE
                     functionScope = locationInfo.scope,
                     diType        = element.descriptor.type.diType(context, codegen.llvmTargetData),
                     name          = element.descriptor.name,
-                    argNo         = if (element.isValueParameter) element.index else 0,
+                    argNo         = element.index + 1,
                     file          = file,
                     line          = locationInfo.line,
                     location      = location)