diff --git a/constants/pinball_game_constants.asm b/constants/pinball_game_constants.asm
index 59fcc9e..4f49694 100644
--- a/constants/pinball_game_constants.asm
+++ b/constants/pinball_game_constants.asm
@@ -12,7 +12,7 @@ DEF NUM_MEWTWO_COMPLETIONS_FOR_MEW EQU 2
 
 DEF MAX_BONUS_MULTIPLIER EQU 99
 
-DEF MAX_EXTRA_BALLS EQU 11
+DEF MAX_EXTRA_BALLS EQU 10
 
 DEF MAP_MOVE_FRAMES_COUNTER        EQU  480 ; 8 seconds until the map move counter decrease by 1
 DEF PINBALL_UPGRADE_FRAMES_COUNTER EQU 3600 ; ~1 minute until the pinball type degrades one stage. (e.g. Great Ball -> Pokeball)
diff --git a/engine/pinball_game/extra_ball.asm b/engine/pinball_game/extra_ball.asm
index 590a59c..b30f9bc 100644
--- a/engine/pinball_game/extra_ball.asm
+++ b/engine/pinball_game/extra_ball.asm
@@ -1,7 +1,7 @@
 AddExtraBall: ; 0x30164
 	ld a, [wExtraBalls]
 	inc a
-	cp MAX_EXTRA_BALLS
+	cp MAX_EXTRA_BALLS + 1
 	jr z, .maxed
 	ld [wExtraBalls], a
 	ld a, $1