diff --git a/ponydos.asm b/ponydos.asm
index a9e6856..a2ae398 100644
--- a/ponydos.asm
+++ b/ponydos.asm
@@ -490,7 +490,7 @@ mouse_handler:
 		test bl, Y_OVERFLOW
 		call xy_handler
 
-	mov bh, 1
+	mov bh, 1 ; Mark that mouse state has updated
 	and bl, BUTTONS
 	mov [cs:di], bx