--- deliantra/server/common/object.C	2007/01/19 18:06:51	1.119
+++ deliantra/server/common/object.C	2007/01/21 21:28:27	1.120
@@ -1751,7 +1751,7 @@
             {
 
               float
-                diff = tmp->move_slow_penalty * FABS (op->speed);
+                diff = tmp->move_slow_penalty * fabs (op->speed);
 
               if (op->type == PLAYER)
                 if ((QUERY_FLAG (tmp, FLAG_IS_HILLY) && find_skill_by_number (op, SK_CLIMBING)) ||