diff --git a/src/modifier/modifier.ts b/src/modifier/modifier.ts
index 181cf6744c0..626d744eef2 100644
--- a/src/modifier/modifier.ts
+++ b/src/modifier/modifier.ts
@@ -525,6 +525,10 @@ export abstract class PokemonHeldItemModifier extends PersistentModifier {
 
   //Applies to items with chance of activating secondary effects ie Kings Rock
   getSecondaryChanceMultiplier(pokemon: Pokemon): integer {
+    // Temporary quickfix to stop game from freezing when the opponet uses u-turn while holding on to king's rock
+    if (!pokemon.getLastXMoves(0)[0]) {
+      return 1;
+    }
     const sheerForceAffected = allMoves[pokemon.getLastXMoves(0)[0].move].chance >= 0 && pokemon.hasAbility(Abilities.SHEER_FORCE);
 
     if (sheerForceAffected) {