diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java
index e92d3a042..9bcf12043 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java
@@ -47,12 +47,15 @@ public class ToxicGas extends Blob implements Hero.Doom {
 			for (int j = area.top; j < area.bottom; j++){
 				cell = i + j*Dungeon.level.width();
 				if (cur[cell] > 0 && (ch = Actor.findChar( cell )) != null) {
-					int damage = (ch.HT + levelDamage) / 40;
-					if (Random.Int( 40 ) < (ch.HT + levelDamage) % 40) {
-						damage++;
-					}
+					if (!ch.immunities().contains(this.getClass())) {
 
-					ch.damage( damage, this );
+						int damage = (ch.HT + levelDamage) / 40;
+						if (Random.Int( 40 ) < (ch.HT + levelDamage) % 40) {
+							damage++;
+						}
+
+						ch.damage(damage, this);
+					}
 				}
 			}
 		}