diff --git a/forge-core/src/main/java/forge/card/CardType.java b/forge-core/src/main/java/forge/card/CardType.java
index afb476e54d8..b229dffa1dc 100644
--- a/forge-core/src/main/java/forge/card/CardType.java
+++ b/forge-core/src/main/java/forge/card/CardType.java
@@ -190,7 +190,7 @@ public final class CardType implements Comparable<CardType>, CardTypeView {
     
     public boolean setCreatureTypes(Collection<String> ctypes) {
         // if it isn't a creature then this has no effect
-        if (coreTypes.contains(CoreType.Creature)) {
+        if (!coreTypes.contains(CoreType.Creature)) {
             return false;
         }
         boolean changed = Iterables.removeIf(subtypes, Predicates.IS_CREATURE_TYPE);