diff --git a/Mage/src/mage/abilities/effects/common/continious/BoostSourceEffect.java b/Mage/src/mage/abilities/effects/common/continious/BoostSourceEffect.java
index 898d30b0057..274bd0c6381 100644
--- a/Mage/src/mage/abilities/effects/common/continious/BoostSourceEffect.java
+++ b/Mage/src/mage/abilities/effects/common/continious/BoostSourceEffect.java
@@ -113,7 +113,7 @@ public class BoostSourceEffect extends ContinuousEffectImpl<BoostSourceEffect> i
         sb.append(p).append("/");
         String t = toughness.toString();
         if(!t.startsWith("-")){
-            if(p.startsWith("-"))
+            if(t.startsWith("-"))
                 sb.append("-");
             else
                 sb.append("+");