diff --git a/include/battle_util.h b/include/battle_util.h
index 666415c16c..ac042f5e00 100644
--- a/include/battle_util.h
+++ b/include/battle_util.h
@@ -175,7 +175,6 @@ enum EjectPackTiming
 };
 
 void HandleAction_ThrowBall(void);
-uq4_12_t CalcTypeEffectivenessMultiplierHelper(enum Move move, enum Type moveType, enum BattlerId battlerAtk, enum BattlerId battlerDef, enum Ability abilityAtk, enum Ability abilityDef, bool32 recordAbilities);
 u32 GetCurrentBattleWeather(void);
 bool32 EndOrContinueWeather(void);
 enum DamageCategory GetReflectDamageMoveDamageCategory(enum BattlerId battler, enum Move move);
@@ -221,7 +220,6 @@ void TryClearRageAndFuryCutter(void);
 bool32 HasNoMonsToSwitch(enum BattlerId battler, u8 partyIdBattlerOn1, u8 partyIdBattlerOn2);
 bool32 TryChangeBattleWeather(enum BattlerId battler, u32 battleWeatherId, enum Ability ability);
 bool32 TryChangeBattleTerrain(enum BattlerId battler, u32 statusFlag);
-bool32 CanAbilityBlockMove(enum BattlerId battlerAtk, enum BattlerId battlerDef, enum Ability abilityAtk, enum Ability abilityDef, u32 move, enum ResultOption option);
 bool32 CanTargetBlockPranksterMove(struct BattleContext *ctx, s32 movePriority);
 bool32 CanPsychicTerrainProtectTarget(struct BattleContext *ctx, s32 movePriority);
 bool32 CanMoveBeBlockedByTarget(struct BattleContext *ctx, s32 movePriority);