diff --git a/include/constants/battle_config.h b/include/constants/battle_config.h
index aaf02a37f1..eb7600cc2a 100644
--- a/include/constants/battle_config.h
+++ b/include/constants/battle_config.h
@@ -181,6 +181,7 @@
 #define B_LURE_BALL_MODIFIER        GEN_7 // In Gen7+, Lure Ball's catch multiplier is x5 instead of x3.
 #define B_HEAVY_BALL_MODIFIER       GEN_7 // In Gen7+, Heavy Ball's ranges change. See Cmd_handleballthrow.
 #define B_DREAM_BALL_MODIFIER       GEN_8 // In Gen8, Dream Ball's catch multiplier is x4 when the target is asleep or has the ability Comatose.
+#define B_SERENE_GRACE_BOOST        GEN_7 // In Gen5+, Serene Grace boosts the added flinch chance of King's Rock and Razor Fang.
 
 // Flag settings
 // To use the following features in scripting, replace the 0s with the flag ID you're assigning it to.
diff --git a/src/battle_util.c b/src/battle_util.c
index 4b3fc11aa9..18847b8cce 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -6860,8 +6860,10 @@ u8 ItemBattleEffects(u8 caseID, u8 battlerId, bool8 moveTurn)
         switch (atkHoldEffect)
         {
         case HOLD_EFFECT_FLINCH:
-            if (GetBattlerAbility(gBattlerAttacker) == ABILITY_SERENE_GRACE)
-                atkHoldEffectParam *= 2;
+            #if B_SERENE_GRACE_BOOST >= GEN_5
+                if (GetBattlerAbility(gBattlerAttacker) == ABILITY_SERENE_GRACE)
+                    atkHoldEffectParam *= 2;
+            #endif
             if (gBattleMoveDamage != 0  // Need to have done damage
                 && !(gMoveResultFlags & MOVE_RESULT_NO_EFFECT)
                 && TARGET_TURN_DAMAGED