diff --git a/usr.bin/procstat/procstat_files.c b/usr.bin/procstat/procstat_files.c
--- a/usr.bin/procstat/procstat_files.c
+++ b/usr.bin/procstat/procstat_files.c
@@ -75,6 +75,8 @@
 			return ("UDS");
 		case SOCK_DGRAM:
 			return ("UDD");
+		case SOCK_SEQPACKET:
+			return ("UDQ");
 		default:
 			return ("UD?");
 		}