diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index d2496881e0..51b6582505 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -1276,7 +1276,7 @@ static void atk04_critcalc(void)
                 + 2 * (holdEffect == HOLD_EFFECT_LUCKY_PUNCH && gBattleMons[gBattlerAttacker].species == SPECIES_CHANSEY)
                 + 2 * (holdEffect == HOLD_EFFECT_STICK && gBattleMons[gBattlerAttacker].species == SPECIES_FARFETCHD);
 
-    if (critChance > ARRAY_COUNT(sCriticalHitChance) - 1 )
+    if (critChance >= ARRAY_COUNT(sCriticalHitChance))
 		critChance = ARRAY_COUNT(sCriticalHitChance) - 1;
 
     if ((gBattleMons[gBattlerTarget].ability != ABILITY_BATTLE_ARMOR && gBattleMons[gBattlerTarget].ability != ABILITY_SHELL_ARMOR)