diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index f9e4a0e..6ca390b 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -859,8 +859,7 @@
             }
         } else if (values[j] != value) {
             Py_XINCREF(value);
-            Py_XDECREF(values[j]);
-            values[j] = value;
+            Py_SETREF(values[j], value);
         }
         Py_XDECREF(value);
     }