diff --git a/game-app/game-core/src/main/java/games/strategy/triplea/delegate/Matches.java b/game-app/game-core/src/main/java/games/strategy/triplea/delegate/Matches.java
index 1edf0fbe750..94c55ad8049 100644
--- a/game-app/game-core/src/main/java/games/strategy/triplea/delegate/Matches.java
+++ b/game-app/game-core/src/main/java/games/strategy/triplea/delegate/Matches.java
@@ -669,7 +669,7 @@ private static Predicate<UnitType> unitTypeCanBeHitByAaFire(
   }
 
   public static Predicate<Unit> unitIsAaOfTypeAa(final String typeAa) {
-    return u -> u.getUnitAttachment().getTypeAa().matches(typeAa);
+    return u -> u.getUnitAttachment().getTypeAa().equals(typeAa);
   }
 
   public static Predicate<Unit> unitAaShotDamageableInsteadOfKillingInstantly() {