Bug: https://bugs.gentoo.org/894640
--- a/shell/hash_md5.cpp
+++ b/shell/hash_md5.cpp
@@ -52,7 +52,7 @@ void MD5Init (MD5Context *ctx)
 // The core of the MD5 algorithm
 void MD5Transform (unsigned buf[4], const unsigned in[16])
 {
-    register unsigned a, b, c, d;
+    unsigned a, b, c, d;
 
     a = buf[0];
     b = buf[1];