--- /n/sources/plan9/sys/src/9/port/segment.c	Thu Jul 22 20:47:18 2010
+++ /sys/src/9/port/segment.c	Sun Feb 28 00:00:00 2016
@@ -76,8 +76,8 @@
 	mapsize = ROUND(size, PTEPERTAB)/PTEPERTAB;
 	if(mapsize > nelem(s->ssegmap)){
 		mapsize *= 2;
-		if(mapsize > (SEGMAPSIZE*PTEPERTAB))
-			mapsize = (SEGMAPSIZE*PTEPERTAB);
+		if(mapsize > SEGMAPSIZE)
+			mapsize = SEGMAPSIZE;
 		s->map = smalloc(mapsize*sizeof(Pte*));
 		s->mapsize = mapsize;
 	}