diff --git a/zsnes/src/gui/guimouse.inc b/zsnes/src/gui/guimouse.inc
index 4f509562..73713998 100644
--- a/zsnes/src/gui/guimouse.inc
+++ b/zsnes/src/gui/guimouse.inc
@@ -895,13 +895,13 @@ SECTION .text
 
 NEWSYM SwitchFullScreen
     pushad
-    mov ecx,255*296
-    mov eax,[vidbufferofsb]
-.loop
-    mov dword[eax],0FEFEFEFEh
-    add eax,4
-    dec ecx
-    jnz .loop
+;    mov ecx,255*296
+;    mov eax,[vidbufferofsb]
+;.loop
+;    mov dword[eax],0FEFEFEFEh
+;    add eax,4
+;    dec ecx
+;    jnz .loop
 
     xor eax,eax
     mov al,[cvidmode]