Bug: https://bugs.gentoo.org/894710
--- a/src/engine/hash.cpp
+++ b/src/engine/hash.cpp
@@ -305,8 +305,8 @@ void HashTable::report(Sit S, MsgType type, MsgCode code, const Str& arg1, const
 
 oolong hash(const Str& key)
 {
-   register oolong a, b, c, len;
-   register const char *k = (const char*) key;
+   oolong a, b, c, len;
+   const char *k = (const char*) key;
 
    /* Set up the internal state */
    len = key.length();