diff --git a/Objects/codeobject.c b/Objects/codeobject.c
index 7d02b038cf5..15d3960fc2d 100644
--- a/Objects/codeobject.c
+++ b/Objects/codeobject.c
@@ -390,6 +390,11 @@ init_code(PyCodeObject *co, struct _PyCodeConstructor *con)
     co->co_filename = Py_NewRef(con->filename);
     co->co_name = Py_NewRef(con->name);
     co->co_qualname = Py_NewRef(con->qualname);
+#ifdef Py_GIL_DISABLED
+    PyUnicode_InternInPlace(&co->co_filename);
+    PyUnicode_InternInPlace(&co->co_name);
+    PyUnicode_InternInPlace(&co->co_qualname);
+#endif
     co->co_flags = con->flags;
 
     co->co_firstlineno = con->firstlineno;