diff --git a/engine/trainer_card.asm b/engine/trainer_card.asm
index 499891fb0..fdf17acc9 100755
--- a/engine/trainer_card.asm
+++ b/engine/trainer_card.asm
@@ -448,7 +448,7 @@ TrainerCard_Page1_PrintGameTime: ; 25415 (9:5415)
 	ret nz
 	hlcoord 15, 12
 	ld a, [hl]
-	xor %01010001 ; $7F (space) <--> $2E (colon)
+	xor $7f ^ $2e ; $7F (space) <--> $2E (colon)
 	ld [hl], a
 	ret