Index: bhyvectl.c
===================================================================
--- bhyvectl.c	(revision 272193)
+++ bhyvectl.c	(working copy)
@@ -309,7 +309,7 @@
 	if (fd < 0)
 		goto done;
 
-	bitmap = mmap(NULL, PAGE_SIZE, PROT_READ, 0, fd, addr);
+	bitmap = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_SHARED, fd, addr);
 	if (bitmap == MAP_FAILED)
 		goto done;