diff --git a/usr.bin/ar/ar.1 b/usr.bin/ar/ar.1
index c64c7f64ac6e..692d8b15bb11 100644
--- a/usr.bin/ar/ar.1
+++ b/usr.bin/ar/ar.1
@@ -92,6 +92,7 @@
 .Ar archive
 .Op Ar files ...
 .Nm ranlib
+.Op Fl D
 .Ar archive ...
 .Sh DESCRIPTION
 The
diff --git a/usr.bin/ar/ar.c b/usr.bin/ar/ar.c
index e5bc1d2682aa..bb53aa43d939 100644
--- a/usr.bin/ar/ar.c
+++ b/usr.bin/ar/ar.c
@@ -113,12 +113,15 @@ main(int argc, char **argv)
 	len = strlen(bsdar->progname);
 	if (len >= strlen("ranlib") &&
 	    strcmp(bsdar->progname + len - strlen("ranlib"), "ranlib") == 0) {
-		while ((opt = getopt_long(argc, argv, "tV", longopts,
+		while ((opt = getopt_long(argc, argv, "tDV", longopts,
 		    NULL)) != -1) {
 			switch(opt) {
 			case 't':
 				/* Ignored. */
 				break;
+			case 'D':
+				bsdar->options |= AR_D;
+				break;
 			case 'V':
 				ranlib_version();
 				break;