diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 27b35191d96..d42c3cee1b1 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -3414,7 +3414,7 @@ asn1obj2py(ASN1_OBJECT *obj)
     int nid;
     const char *ln, *sn;
     char buf[100];
-    int buflen;
+    Py_ssize_t buflen;
 
     nid = OBJ_obj2nid(obj);
     if (nid == NID_undef) {