diff --git a/sys/compat/linux/linux_socket.h b/sys/compat/linux/linux_socket.h
--- a/sys/compat/linux/linux_socket.h
+++ b/sys/compat/linux/linux_socket.h
@@ -199,6 +199,7 @@
 #define	LINUX_SO_SNDBUFFORCE	32
 #define	LINUX_SO_RCVBUFFORCE	33
 #define	LINUX_SO_PROTOCOL	38
+#define	LINUX_SO_DOMAIN		39
 #define	LINUX_SO_PEERGROUPS	59
 
 /* Socket options */
diff --git a/sys/compat/linux/linux_socket.c b/sys/compat/linux/linux_socket.c
--- a/sys/compat/linux/linux_socket.c
+++ b/sys/compat/linux/linux_socket.c
@@ -553,6 +553,8 @@
 		return (SO_ACCEPTCONN);
 	case LINUX_SO_PROTOCOL:
 		return (SO_PROTOCOL);
+	case LINUX_SO_DOMAIN:
+		return (SO_DOMAIN);
 	}
 	return (-1);
 }
@@ -2008,6 +2010,17 @@
 			newval = -bsd_to_linux_errno(newval);
 			return (copyout(&newval, PTRIN(args->optval), len));
 			/* NOTREACHED */
+		case SO_DOMAIN:
+			len = sizeof(newval);
+			error = kern_getsockopt(td, args->s, level,
+			    name, &newval, UIO_SYSSPACE, &len);
+			if (error != 0)
+				return (error);
+			newval = bsd_to_linux_domain(newval);
+			if (newval == -1)
+				return (ENOPROTOOPT);
+			return (copyout(&newval, PTRIN(args->optval), len));
+			/* NOTREACHED */
 		default:
 			break;
 		}