diff --git a/Python/pystate.c b/Python/pystate.c
index a474549..8dbda73 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1242,6 +1242,7 @@
             break;
         }
     }
+    Py_DECREF(cls);
     PyThread_release_lock(_PyRuntime.xidregistry.mutex);
     return getdata;
 }