--- src/lib/KEY1Token.inc
+++ src/lib/KEY1Token.inc
@@ -524,7 +524,7 @@
 
   if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
     {
-      register int key = hash (str, len);
+      int key = hash (str, len);
 
       if (key <= MAX_HASH_VALUE && key >= 0)
         {