diff --git a/src/monster/misc/move.c b/src/monster/misc/move.c
index 1c7835b..37eca36 100644
--- a/src/monster/misc/move.c
+++ b/src/monster/misc/move.c
@@ -573,7 +573,7 @@ SV_NewChaseDir(edict_t *actor, edict_t *enemy, float dist)
 	}
 
 	/* try other directions */
-	if (((rand() & 3) & 1) || (abs(deltay) > abs(deltax)))
+	if (((rand() & 3) & 1) || (fabsf(deltay) > fabsf(deltax)))
 	{
 		tdir = d[1];
 		d[1] = d[2];