diff --git a/forge-game/src/main/java/forge/game/card/CardLists.java b/forge-game/src/main/java/forge/game/card/CardLists.java
index 8820974382b..bbaa95b1bfc 100644
--- a/forge-game/src/main/java/forge/game/card/CardLists.java
+++ b/forge-game/src/main/java/forge/game/card/CardLists.java
@@ -350,11 +350,14 @@ public class CardLists {
 
     /**
      * Given a list of cards, return their combined power
+     * 
+     * @param cardList the list of creature cards for which to sum the power
+     * @param ignoreNegativePower if true, treats negative power as 0
      */
-    public static int getTotalPower(Iterable<Card> cardList) {
+    public static int getTotalPower(Iterable<Card> cardList, boolean ignoreNegativePower) {
         int total = 0;
         for (final Card crd : cardList) {
-            total += crd.getNetPower();
+            total += ignoreNegativePower ? Math.max(0, crd.getNetPower()) : crd.getNetPower();
         }
         return total;
     }
diff --git a/forge-game/src/main/java/forge/game/cost/CostTapType.java b/forge-game/src/main/java/forge/game/cost/CostTapType.java
index 782452b9522..638a05b2022 100644
--- a/forge-game/src/main/java/forge/game/cost/CostTapType.java
+++ b/forge-game/src/main/java/forge/game/cost/CostTapType.java
@@ -148,7 +148,7 @@ public class CostTapType extends CostPartWithList {
 
         if (totalPower) {
             final int i = Integer.parseInt(totalP);
-            return CardLists.getTotalPower(typeList) >= i;
+            return CardLists.getTotalPower(typeList, true) >= i;
         }
 
         final Integer amount = this.convertAmount();
diff --git a/forge-gui/src/main/java/forge/player/HumanCostDecision.java b/forge-gui/src/main/java/forge/player/HumanCostDecision.java
index 34c3e62f2b3..5612617ab32 100644
--- a/forge-gui/src/main/java/forge/player/HumanCostDecision.java
+++ b/forge-gui/src/main/java/forge/player/HumanCostDecision.java
@@ -1169,7 +1169,7 @@ public class HumanCostDecision extends CostDecisionMakerBase {
             inp.setCancelAllowed(true);
             inp.showAndWait();
 
-            if (inp.hasCancelled() || CardLists.getTotalPower(inp.getSelected()) < i) {
+            if (inp.hasCancelled() || CardLists.getTotalPower(inp.getSelected(), true) < i) {
                 return null;
             }
             return PaymentDecision.card(inp.getSelected());