diff --git a/include/constants/battle_config.h b/include/constants/battle_config.h
index 183e8aec66..566a239822 100644
--- a/include/constants/battle_config.h
+++ b/include/constants/battle_config.h
@@ -231,6 +231,7 @@
 #define B_UPDATED_INTIMIDATE        GEN_8 // In Gen8, Intimidate doesn't work on opponents with the Inner Focus, Scrappy, Own Tempo or Oblivious abilities. It also activates Rattled.
 #define B_OBLIVIOUS_TAUNT           GEN_7 // In Gen6+, Pokémon with Oblivious can't be taunted.
 #define B_STURDY                    GEN_7 // In Gen5+, Sturdy causes the Pokémon to have 1 HP remaining if another Pokémon's attack or confusion damage would have brought it from full health to 0 HP.
+#define B_PLUS_MINUS_INTERACTION    GEN_7 // In Gen5+, Plus and Minus can be activated with themselves and the opposite ability. Before, only the opposing ability could activate it.
 
 // Item settings
 #define B_HP_BERRIES                GEN_7 // In Gen4+, berries which restore hp activate immediately after HP drops to half. In Gen3, the effect occurs at the end of the turn.
diff --git a/src/battle_util.c b/src/battle_util.c
index defbbb6a00..e13b5b3780 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -8694,6 +8694,7 @@ static u32 CalcAttackStat(u16 move, u8 battlerAtk, u8 battlerDef, u8 moveType, b
         if (moveType == TYPE_GRASS && gBattleMons[battlerAtk].hp <= (gBattleMons[battlerAtk].maxHP / 3))
             MulModifier(&modifier, UQ_4_12(1.5));
         break;
+    #if B_PLUS_MINUS_INTERACTION >= GEN_5
     case ABILITY_PLUS:
     case ABILITY_MINUS:
         if (IsBattlerAlive(BATTLE_PARTNER(battlerAtk)))
@@ -8703,6 +8704,16 @@ static u32 CalcAttackStat(u16 move, u8 battlerAtk, u8 battlerDef, u8 moveType, b
                 MulModifier(&modifier, UQ_4_12(1.5));
         }
         break;
+    #else
+    case ABILITY_PLUS:
+        if (IsBattlerAlive(BATTLE_PARTNER(battlerAtk)) && GetBattlerAbility(BATTLE_PARTNER(battlerAtk)) == ABILITY_MINUS)
+            MulModifier(&modifier, UQ_4_12(1.5));
+        break;
+    case ABILITY_MINUS:
+        if (IsBattlerAlive(BATTLE_PARTNER(battlerAtk)) && GetBattlerAbility(BATTLE_PARTNER(battlerAtk)) == ABILITY_PLUS)
+            MulModifier(&modifier, UQ_4_12(1.5));
+        break;
+    #endif
     case ABILITY_FLOWER_GIFT:
         if (gBattleMons[battlerAtk].species == SPECIES_CHERRIM && IsBattlerWeatherAffected(battlerAtk, B_WEATHER_SUN) && IS_MOVE_PHYSICAL(move))
             MulModifier(&modifier, UQ_4_12(1.5));