diff --git a/src/lib9/truerand.c b/src/lib9/truerand.c
index aaf10f0a..04462e27 100644
--- a/src/lib9/truerand.c
+++ b/src/lib9/truerand.c
@@ -10,10 +10,12 @@ truerand(void)
 
 	if(randfd < 0){
 		randfd = open("/dev/random", OREAD);
+		if(randfd < 0)
+			randfd = open("/dev/srandom", OREAD);	/* OpenBSD */
+		if(randfd < 0)
+			sysfatal("can't open /dev/random: %r");
 		fcntl(randfd, F_SETFD, FD_CLOEXEC);
 	}
-	if(randfd < 0)
-		sysfatal("can't open /dev/random: %r");
 	for(i=0; i<sizeof(buf); i += n)
 		if((n = readn(randfd, buf+i, sizeof(buf)-i)) < 0)
 			sysfatal("can't read /dev/random: %r");