1 files changed, 1 insertions, 1 deletions
diff --git a/macros.asm b/macros.asm
index 11f0f37b..62fd4b53 100644
--- a/macros.asm
+++ b/macros.asm
@@ -428,7 +428,7 @@ event_fill_count = 1 + event_fill_count
 		ELSE
 			IF ((\2) % 8) != 7
 				ld a, [wEventFlags + event_end_byte]
-				and ~((1 << (((\2) % 8) + 1)) - 1) $ ff
+				and ~((1 << (((\2) % 8) + 1)) - 1) & $ff
 				ld [wEventFlags + event_end_byte], a
 			ENDC
 		ENDC