diff --git a/src/p_enemy.c b/src/p_enemy.c
index 63a14636d..5feae4188 100644
--- a/src/p_enemy.c
+++ b/src/p_enemy.c
@@ -1834,7 +1834,7 @@ void A_SnailerThink(mobj_t *actor)
 			fixed_t dist;
 			fixed_t dx, dy;
 
-			dist = P_AproxDistance(actor->x - actor->target->x, actor->y - actor->target->y);
+			dist = R_PointToDist2(0, 0, actor->x - actor->target->x, actor->y - actor->target->y);
 
 			if (an > ANGLE_45 && an <= ANGLE_90) // fire at 45 degrees to the left
 			{