diff --git a/viewer.asm b/viewer.asm
index b7eb04c..a36e0db 100644
--- a/viewer.asm
+++ b/viewer.asm
@@ -452,9 +452,8 @@ event_mouse:
 ;  bx = Y
 ;  cx = X
 ;  dl = mouse buttons
-; out:
-;  clobbers ax
 event_click:
+	push ax
 	; This is not a true event passed into our event handler, but
 	; rather one we've synthetized from the mouse event
 	; The reason we synthetize this event is because most interface
@@ -506,6 +505,7 @@ event_click:
 	.not_title_bar:
 
 	.end:
+	pop ax
 	ret
 
 ; in: