diff --git a/src/data/moves/move.ts b/src/data/moves/move.ts
index e4d7c8e3361..f83b7a7e012 100644
--- a/src/data/moves/move.ts
+++ b/src/data/moves/move.ts
@@ -5782,7 +5782,7 @@ export class ProtectAttr extends AddBattlerTagAttr {
     return ((user, target, move): boolean => {
       let timesUsed = 0;
 
-      for (const turnMove of user.tempSummonData.waveMoveHistory.reverse()) {
+      for (const turnMove of user.tempSummonData.waveMoveHistory.slice().reverse()) {
         if (
           // Quick & Wide guard increment the Protect counter without using it for fail chance
           !(allMoves[turnMove.move].hasAttr(ProtectAttr) ||