diff --git a/src/data/battler-tags.ts b/src/data/battler-tags.ts
index 362f31357e2..71b891ed5c5 100644
--- a/src/data/battler-tags.ts
+++ b/src/data/battler-tags.ts
@@ -669,6 +669,10 @@ export class PerishSongTag extends BattlerTag {
     super(BattlerTagType.PERISH_SONG, BattlerTagLapseType.TURN_END, turnCount, Moves.PERISH_SONG);
   }
 
+  canAdd(pokemon: Pokemon): boolean {
+    return !pokemon.isBossImmune();
+  }
+
   lapse(pokemon: Pokemon, lapseType: BattlerTagLapseType): boolean {
     const ret = super.lapse(pokemon, lapseType);
 
diff --git a/src/data/move.ts b/src/data/move.ts
index 78f85c25eb9..35dd31675b7 100644
--- a/src/data/move.ts
+++ b/src/data/move.ts
@@ -1826,10 +1826,8 @@ export class AddBattlerTagAttr extends MoveEffectAttr {
       return false;
 
     const chance = this.getTagChance(user, target, move);
-    if (chance < 0 || chance === 100 || user.randSeedInt(100) < chance) {
-      (this.selfTarget ? user : target).addTag(this.tagType,  user.randSeedInt(this.turnCountMax - this.turnCountMin, this.turnCountMin), move.id, user.id);
-      return true;
-    }
+    if (chance < 0 || chance === 100 || user.randSeedInt(100) < chance)
+      return (this.selfTarget ? user : target).addTag(this.tagType,  user.randSeedInt(this.turnCountMax - this.turnCountMin, this.turnCountMin), move.id, user.id);
 
     return false;
   }