diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/GreatCrab.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/GreatCrab.java
index a8f6501d3..3e4702156 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/GreatCrab.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/GreatCrab.java
@@ -72,8 +72,12 @@ public class GreatCrab extends Crab {
 	public void damage( int dmg, Object src ){
 		//crab blocks all wand damage from the hero if it sees them.
 		//Direct damage is negated, but add-on effects and environmental effects go through as normal.
-		if ((enemySeen && state != SLEEPING && paralysed == 0)
-				&& (src instanceof Wand && enemy == Dungeon.hero)){
+		if (enemySeen
+				&& state != SLEEPING
+				&& paralysed == 0
+				&& src instanceof Wand
+				&& enemy == Dungeon.hero
+				&& enemy.invisible == 0){
 			GLog.n( Messages.get(this, "noticed") );
 			sprite.showStatus( CharSprite.NEUTRAL, Messages.get(this, "def_verb") );
 			Sample.INSTANCE.play( Assets.Sounds.HIT_PARRY, 1, Random.Float(0.96f, 1.05f));
@@ -85,7 +89,11 @@ public class GreatCrab extends Crab {
 	@Override
 	public int defenseSkill( Char enemy ) {
 		//crab blocks all melee attacks from its current target
-		if (enemySeen && state != SLEEPING && paralysed == 0 && enemy == this.enemy){
+		if (enemySeen
+				&& state != SLEEPING
+				&& paralysed == 0
+				&& enemy == this.enemy
+				&& enemy.invisible == 0){
 			if (sprite != null && sprite.visible) {
 				Sample.INSTANCE.play(Assets.Sounds.HIT_PARRY, 1, Random.Float(0.96f, 1.05f));
 				GLog.n( Messages.get(this, "noticed") );