diff --git a/constants/battle_tower_constants.asm b/constants/battle_tower_constants.asm
index b230bb1ab..419d364c7 100644
--- a/constants/battle_tower_constants.asm
+++ b/constants/battle_tower_constants.asm
@@ -56,6 +56,6 @@ MOBILE_EVENT_OBJECT_GS_BALL EQU $b
 	const_def
 	const BATTLETOWER_NO_CHALLENGE
 	const BATTLETOWER_SAVED_AND_LEFT
-	const BATTLETOWER_CHALLENGE_IN_PROGESS
+	const BATTLETOWER_CHALLENGE_IN_PROGRESS
 	const BATTLETOWER_WON_CHALLENGE
 	const BATTLETOWER_RECEIVED_REWARD
diff --git a/engine/events/battle_tower/battle_tower.asm b/engine/events/battle_tower/battle_tower.asm
index 8eabc71ca..5382fa64b 100644
--- a/engine/events/battle_tower/battle_tower.asm
+++ b/engine/events/battle_tower/battle_tower.asm
@@ -564,7 +564,7 @@ CopyBTTrainer_FromBT_OT_TowBT_OTTemp:
 
 	ld a, BANK(sBattleTowerChallengeState)
 	call OpenSRAM
-	ld a, BATTLETOWER_CHALLENGE_IN_PROGESS
+	ld a, BATTLETOWER_CHALLENGE_IN_PROGRESS
 	ld [sBattleTowerChallengeState], a
 	ld hl, sNrOfBeatenBattleTowerTrainers
 	inc [hl]