--- /n/sources/plan9/sys/src/9/pc/vga.c	Sun Nov  6 15:23:15 2005
+++ /sys/src/9/pc/vga.c	Sun Apr 24 00:00:00 2016
@@ -70,7 +70,7 @@
 	Rectangle r;
 
 //	drawdebug = 1;
-	if(xp < xbuf || xp >= &xbuf[sizeof(xbuf)])
+	if(xp < xbuf || xp >= &xbuf[nelem(xbuf)])
 		xp = xbuf;
 
 	h = scr->memdefont->height;