diff --git a/mypyc/codegen/emitmodule.py b/mypyc/codegen/emitmodule.py
index 1ee2ee2aadd8..f914bfd6345d 100644
--- a/mypyc/codegen/emitmodule.py
+++ b/mypyc/codegen/emitmodule.py
@@ -582,7 +582,7 @@ def generate_c_for_modules(self) -> list[tuple[str, str]]:
                             fn, emitter, self.source_paths[module_name], module_name
                         )
             if multi_file:
-                name = f"__native_{emitter.names.private_name(module_name)}.c"
+                name = f"__native_{exported_name(module_name)}.c"
                 file_contents.append((name, "".join(emitter.fragments)))
 
         # The external header file contains type declarations while