diff --git a/Python/traceback.c b/Python/traceback.c
index 95bef64..8b32864 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -178,11 +178,12 @@
     return 0;
 }
 
-static void
+static int
 tb_clear(PyTracebackObject *tb)
 {
     Py_CLEAR(tb->tb_next);
     Py_CLEAR(tb->tb_frame);
+    return 0;
 }
 
 PyTypeObject PyTraceBack_Type = {