diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 4c92a90..fe47fd1 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1027,7 +1027,7 @@
 	PyObject *sysin, *sysout, *syserr;
 	char *s;
 #ifdef MS_WINDOWS
-	char buf[10];
+	char buf[128];
 #endif
 
 	m = Py_InitModule3("sys", sys_methods, sys_doc);