diff --git a/Python/ceval.c b/Python/ceval.c
index d24241465a65..43dcdd035a51 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2173,6 +2173,10 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
 
 		case CONTINUE_LOOP:
 			retval = PyInt_FromLong(oparg);
+			if (!retval) {
+				x = NULL;
+				break;
+			}
 			why = WHY_CONTINUE;
 			goto fast_block_end;