diff --git a/js/battle.js b/js/battle.js
index f984bc2c2..420a0ad3a 100644
--- a/js/battle.js
+++ b/js/battle.js
@@ -5116,7 +5116,7 @@ var Battle = (function () {
 					break;
 				case 'grudge':
 					actions += "" + poke.getName() + "'s " + Tools.escapeHTML(args[3]) + " lost all of its PP due to the grudge!";
-					poke.markMove(args[3], 64);
+					poke.markMove(args[3], Infinity);
 					break;
 				case 'quickguard':
 					poke.addTurnstatus('quickguard');
diff --git a/js/client-battle-tooltips.js b/js/client-battle-tooltips.js
index 56e758ef2..7228407ee 100644
--- a/js/client-battle-tooltips.js
+++ b/js/client-battle-tooltips.js
@@ -732,6 +732,7 @@ var BattleTooltips = (function () {
 			}
 			maxpp = Math.floor(maxpp * 8 / 5);
 		}
+		if (ppUsed === Infinity) return move.name + ' <small>(0/' + maxpp + ')</small>';
 		if (!ppUsed) return move.name + (showKnown ? ' <small>(revealed)</small>' : '');
 		return move.name + ' <small>(' + (maxpp - ppUsed) + '/' + maxpp + ')</small>';
 	};