--- lib/mcrypt_modules.h.orig	2008-12-13 13:55:57.000000000 -0500
+++ lib/mcrypt_modules.h	2008-12-13 13:52:55.000000000 -0500
@@ -1,4 +1,4 @@
-#define rotl32(x,n)   (((x) << ((word32)(n))) | ((x) >> (32 - (word32)(n))))
+#define rotl32(x,n)   (((x) << ((word32)(n & 31))) | ((x) >> (32 - (word32)(n & 31))))
 #define rotr32(x,n)   (((x) >> ((word32)(n))) | ((x) << (32 - (word32)(n))))
 #define rotl16(x,n)   (((x) << ((word16)(n))) | ((x) >> (16 - (word16)(n))))
 #define rotr16(x,n)   (((x) >> ((word16)(n))) | ((x) << (16 - (word16)(n))))