diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/DM300.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/DM300.java
index 6f824c78a..db38d9f51 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/DM300.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/DM300.java
@@ -68,6 +68,7 @@ import com.watabou.noosa.Camera;
 import com.watabou.noosa.audio.Sample;
 import com.watabou.noosa.particles.Emitter;
 import com.watabou.utils.Bundle;
+import com.watabou.utils.GameMath;
 import com.watabou.utils.PathFinder;
 import com.watabou.utils.Point;
 import com.watabou.utils.Random;
@@ -454,7 +455,7 @@ public class DM300 extends Mob {
 				pos++;
 			}
 		}
-		Buff.append(this, FallingRockBuff.class, Math.min(target.cooldown(), 3*TICK)).setRockPositions(rockCells);
+		Buff.append(this, FallingRockBuff.class, GameMath.gate(TICK, target.cooldown(), 3*TICK)).setRockPositions(rockCells);
 
 	}