diff --git a/include/common/hathreads.h b/include/common/hathreads.h
index a7c8dc936..b05215bd7 100644
--- a/include/common/hathreads.h
+++ b/include/common/hathreads.h
@@ -562,6 +562,7 @@ enum lock_label {
 	AUTH_LOCK,
 	LOGSRV_LOCK,
 	DICT_LOCK,
+	PROTO_LOCK,
 	OTHER_LOCK,
 	LOCK_LABELS
 };
@@ -679,6 +680,7 @@ static inline const char *lock_label(enum lock_label label)
 	case AUTH_LOCK:            return "AUTH";
 	case LOGSRV_LOCK:          return "LOGSRV";
 	case DICT_LOCK:            return "DICT";
+	case PROTO_LOCK:           return "PROTO";
 	case OTHER_LOCK:           return "OTHER";
 	case LOCK_LABELS:          break; /* keep compiler happy */
 	};