1 files changed, 2 insertions, 1 deletions
diff --git a/Parser/pegen.c b/Parser/pegen.c
index 009e5ba..6efb547 100644
--- a/Parser/pegen.c
+++ b/Parser/pegen.c
@@ -528,7 +528,8 @@ _PyPegen_new_identifier(Parser *p, const char *n)
         }
         id = id2;
     }
-    PyUnicode_InternInPlace(&id);
+    PyInterpreterState *interp = _PyInterpreterState_GET();
+    _PyUnicode_InternImmortal(interp, &id);
     if (_PyArena_AddPyObject(p->arena, id) < 0)
     {
         Py_DECREF(id);