diff --git a/src/battle_util.c b/src/battle_util.c
index 5f633fc1e4..1e56ab1914 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -4211,11 +4211,14 @@ static uq4_12_t GetSupremeOverlordModifier(u32 battler)
     return modifier;
 }
 
-static bool32 HadMoreThanHalfHpNowHasLess(u32 battler)
+static inline bool32 HadMoreThanHalfHpNowHasLess(u32 battler)
 {
+    u32 cutoff = gBattleMons[battler].maxHP / 2;
+    if (gBattleMons[battler].maxHP % 2 == 1)
+        cutoff++;
     // Had more than half of hp before, now has less
-     return (gBattleStruct->hpBefore[battler] >= gBattleMons[battler].maxHP / 2
-             && gBattleMons[battler].hp < gBattleMons[battler].maxHP / 2);
+     return (gBattleStruct->hpBefore[battler] >= cutoff
+             && gBattleMons[battler].hp < cutoff);
 }
 
 u32 AbilityBattleEffects(u32 caseID, u32 battler, u32 ability, u32 special, u32 moveArg)
@@ -5271,8 +5274,7 @@ u32 AbilityBattleEffects(u32 caseID, u32 battler, u32 ability, u32 special, u32
              && TARGET_TURN_DAMAGED
              && IsBattlerAlive(battler)
             // Had more than half of hp before, now has less
-             && gBattleStruct->hpBefore[battler] > gBattleMons[battler].maxHP / 2
-             && gBattleMons[battler].hp < gBattleMons[battler].maxHP / 2
+             && HadMoreThanHalfHpNowHasLess(battler)
              && (gMultiHitCounter == 0 || gMultiHitCounter == 1)
              && !(TestSheerForceFlag(gBattlerAttacker, gCurrentMove))
              && (CanBattlerSwitch(battler) || !(gBattleTypeFlags & BATTLE_TYPE_TRAINER))
diff --git a/test/battle/ability/emergency_exit.c b/test/battle/ability/emergency_exit.c
new file mode 100644
index 0000000000..ad1fd630a0
--- /dev/null
+++ b/test/battle/ability/emergency_exit.c
@@ -0,0 +1,20 @@
+#include "global.h"
+#include "test/battle.h"
+
+SINGLE_BATTLE_TEST("Emergency Exit switches out when taking 50% max-hp damage")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET) { Attack(1314); }; // will deal exactly 132 damage, putting GOLISOPOD just under half hp
+        OPPONENT(SPECIES_GOLISOPOD) { Ability(ABILITY_EMERGENCY_EXIT); MaxHP(263); HP(263); };
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN {
+            MOVE(player, MOVE_POUND);
+            SEND_OUT(opponent, 1);
+        }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_POUND, player);
+        HP_BAR(opponent);
+        ABILITY_POPUP(opponent, ABILITY_EMERGENCY_EXIT);
+    }
+}