diff --git a/src/battle_util.c b/src/battle_util.c
index 210f00b270..e38096ee29 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -7116,7 +7116,9 @@ static u32 CalcAttackStat(u16 move, u8 battlerAtk, u8 battlerDef, u8 moveType, b
     switch (GetBattlerHoldEffect(battlerAtk, TRUE))
     {
     case HOLD_EFFECT_THICK_CLUB:
-        if ((gBattleMons[battlerAtk].species == SPECIES_CUBONE || gBattleMons[battlerAtk].species == SPECIES_MAROWAK) && IS_MOVE_PHYSICAL(move))
+        if ((GET_BASE_SPECIES_ID(gBattleMons[battlerAtk].species) == SPECIES_CUBONE
+         || GET_BASE_SPECIES_ID(gBattleMons[battlerAtk].species) == SPECIES_MAROWAK)
+         && IS_MOVE_PHYSICAL(move))
             MulModifier(&modifier, UQ_4_12(2.0));
         break;
     case HOLD_EFFECT_DEEP_SEA_TOOTH: