diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 21f6e66..4b819da 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2363,6 +2363,11 @@
             }
             /* Either overflowed or is not an int. Restore real objects and process normally */
             result = PyInt_FromLong(i_result);
+            if (result == NULL) {
+                Py_DECREF(item);
+                Py_DECREF(iter);
+                return NULL;
+            }
             temp = PyNumber_Add(result, item);
             Py_DECREF(result);
             Py_DECREF(item);