diff --git a/d2/main/laser.c b/d2/main/laser.c
index 0bbd9c0..e20fe44 100644
--- a/d2/main/laser.c
+++ b/d2/main/laser.c
@@ -1526,7 +1526,7 @@ void Laser_do_weapon_sequence(object *obj, int doHomerFrame, fix idealHomerFrame
 					} 
 				}
 				if (speed+F1_0 < max_speed) {
-					speed += fixmul(max_speed, FrameTime/2);
+					speed += fixmul(max_speed, idealHomerFrameTime/2);
 					if (speed > max_speed)
 						speed = max_speed;
 				}