diff --git a/data/battle_scripts_2.s b/data/battle_scripts_2.s
index 378819a944..996048dd3d 100644
--- a/data/battle_scripts_2.s
+++ b/data/battle_scripts_2.s
@@ -34,7 +34,7 @@ gBattlescriptsForUsingItem:: @ 82DBD3C
 	.4byte BattleScript_OpponentUsesHealItem        @ AI_ITEM_HEAL_HP
 	.4byte BattleScript_OpponentUsesStatusCureItem  @ AI_ITEM_CURE_CONDITION
 	.4byte BattleScript_OpponentUsesXItem           @ AI_ITEM_X_STAT
-	.4byte BattleScript_OpponentUsesGuardSpecs      @ AI_ITEM_GUARD_SPECS
+	.4byte BattleScript_OpponentUsesGuardSpec       @ AI_ITEM_GUARD_SPEC
 
 	.align 2
 gBattlescriptsForRunningByItem:: @ 82DBD54
@@ -155,7 +155,7 @@ BattleScript_OpponentUsesXItem::
 	moveendcase MOVEEND_MIRROR_MOVE
 	finishaction
 
-BattleScript_OpponentUsesGuardSpecs::
+BattleScript_OpponentUsesGuardSpec::
 	printstring STRINGID_EMPTYSTRING3
 	pause B_WAIT_TIME_MED
 	playse SE_USE_ITEM
diff --git a/include/battle_ai_switch_items.h b/include/battle_ai_switch_items.h
index db390346d3..a0b6fe62c3 100644
--- a/include/battle_ai_switch_items.h
+++ b/include/battle_ai_switch_items.h
@@ -7,7 +7,7 @@ enum
     AI_ITEM_HEAL_HP,
     AI_ITEM_CURE_CONDITION,
     AI_ITEM_X_STAT,
-    AI_ITEM_GUARD_SPECS,
+    AI_ITEM_GUARD_SPEC,
     AI_ITEM_NOT_RECOGNIZABLE
 };
 
diff --git a/src/battle_ai_switch_items.c b/src/battle_ai_switch_items.c
index e926308085..04122b17d1 100644
--- a/src/battle_ai_switch_items.c
+++ b/src/battle_ai_switch_items.c
@@ -789,7 +789,7 @@ static u8 GetAI_ItemType(u8 itemId, const u8 *itemEffect) // NOTE: should take u
     else if (itemEffect[0] & (ITEM0_DIRE_HIT | ITEM0_X_ATTACK) || itemEffect[1] != 0 || itemEffect[2] != 0)
         return AI_ITEM_X_STAT;
     else if (itemEffect[3] & ITEM3_GUARD_SPEC)
-        return AI_ITEM_GUARD_SPECS;
+        return AI_ITEM_GUARD_SPEC;
     else
         return AI_ITEM_NOT_RECOGNIZABLE;
 }
@@ -911,7 +911,7 @@ static bool8 ShouldUseItem(void)
                 *(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_DIRE_HIT);
             shouldUse = TRUE;
             break;
-        case AI_ITEM_GUARD_SPECS:
+        case AI_ITEM_GUARD_SPEC:
             battlerSide = GetBattlerSide(gActiveBattler);
             if (gDisableStructs[gActiveBattler].isFirstTurn != 0 && gSideTimers[battlerSide].mistTimer == 0)
                 shouldUse = TRUE;
diff --git a/src/battle_util.c b/src/battle_util.c
index e2dfeef271..cbcd445b7e 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -378,10 +378,19 @@ void HandleAction_UseItem(void)
                 gBattleScripting.animArg2 = 0;
             }
             break;
-        case AI_ITEM_GUARD_SPECS:
+        case AI_ITEM_GUARD_SPEC:
+            // It seems probable that at some point there was a special message for
+            // an AI trainer using Guard Spec in a double battle.
+            // There isn't now however, and the assignment to 2 below goes out of
+            // bounds for gMistUsedStringIds and instead prints "{mon} is getting pumped"
+            // from the next table, gFocusEnergyUsedStringIds.
+            // In any case this isn't an issue in the retail version, as no trainers
+            // are ever given any Guard Spec to use.
+#ifndef UBFIX
             if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
-                gBattleCommunication[MULTISTRING_CHOOSER] = 2; // Going OOB for gMistUsedStringIds? 
+                gBattleCommunication[MULTISTRING_CHOOSER] = 2;
             else
+#endif
                 gBattleCommunication[MULTISTRING_CHOOSER] = B_MSG_SET_MIST;
             break;
         }