diff --git a/sys/src/9/pc/vgaigfx.c b/sys/src/9/pc/vgaigfx.c
index 159ddeac1..ecc90edf3 100644
--- a/sys/src/9/pc/vgaigfx.c
+++ b/sys/src/9/pc/vgaigfx.c
@@ -12,8 +12,6 @@
 #include <cursor.h>
 #include "screen.h"
 
-#define MB	0x100000
-
 static ulong
 preallocsize(Pcidev *p)
 {