--- Python/pystrcmp.c.orig      2014-05-19 14:19:40.000000000 +0900
+++ Python/pystrcmp.c   2014-09-03 17:48:41.140048124 +0900
@@ -19,8 +19,8 @@
 int
 PyOS_mystricmp(const char *s1, const char *s2)
 {
-    while (*s1 && (tolower((unsigned)*s1++) == tolower((unsigned)*s2++))) {
-        ;
+    while (*s1 && (tolower((unsigned)*s1) == tolower((unsigned)*s2))) {
+        ++s1, ++s2;
     }
     return (tolower((unsigned)*s1) - tolower((unsigned)*s2));
 }