diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 498fa91..f04403b 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -2544,7 +2544,7 @@
             Py_DECREF(v);
             return NULL;
         }
-        PyList_SetItem(v, i, w);
+        PyList_SET_ITEM(v, i, w);
         if (*p == '\0')
             break;
         path = p+1;