diff --git a/dev/misc/dcons/dcons_os.c b/dev/misc/dcons/dcons_os.c
--- a/dev/misc/dcons/dcons_os.c
+++ b/dev/misc/dcons/dcons_os.c
@@ -460,7 +460,7 @@
 		 * bssbuf could be non-continuous.
 		 */ 
 		dg.buf = (struct dcons_buf *) contigmalloc(dg.size,
-			M_DEVBUF, 0, 0x10000, 0xffffffff, PAGE_SIZE, 0ul);
+			M_DEVBUF, M_ZERO, 0x10000, 0xffffffff, PAGE_SIZE, 0ul);
 		dcons_init(dg.buf, dg.size, sc);
 	}