diff --git a/include/qb/qbipc_common.h b/include/qb/qbipc_common.h
index 0a4118c..2253941 100644
--- a/include/qb/qbipc_common.h
+++ b/include/qb/qbipc_common.h
@@ -1,66 +1,71 @@
 /*
  * Copyright (c) 2010 Red Hat, Inc.
  *
  * All rights reserved.
  *
  * Author: Angus Salkeld <asalkeld@redhat.com>
  *
  * This file is part of libqb.
  *
  * libqb is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
  * the Free Software Foundation, either version 2.1 of the License, or
  * (at your option) any later version.
  *
  * libqb is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public License
  * along with libqb.  If not, see <http://www.gnu.org/licenses/>.
  */
 #ifndef QB_IPC_COMMON_H_DEFINED
 #define QB_IPC_COMMON_H_DEFINED
 
 #include <stdint.h>
 
 /* *INDENT-OFF* */
 #ifdef __cplusplus
 extern "C" {
 #endif
 /* *INDENT-ON* */
 
+/**
+ * @file qbipc_common.h
+ * common types and definitions
+ */
+
 struct qb_ipc_request_header {
 	int32_t id __attribute__ ((aligned(8)));
 	int32_t size __attribute__ ((aligned(8)));
 } __attribute__ ((aligned(8)));
 
 struct qb_ipc_response_header {
 	int32_t id __attribute__ ((aligned(8)));
 	int32_t size __attribute__ ((aligned(8)));
 	int32_t error __attribute__ ((aligned(8)));
 } __attribute__ ((aligned(8)));
 
 enum qb_ipc_type {
 	QB_IPC_SOCKET,
 	QB_IPC_SHM,
 	QB_IPC_POSIX_MQ,
 	QB_IPC_SYSV_MQ,
 	QB_IPC_NATIVE,
 };
 
 
 #define QB_IPC_MSG_NEW_MESSAGE 0
 #define QB_IPC_MSG_USER_START QB_IPC_MSG_NEW_MESSAGE
 #define QB_IPC_MSG_AUTHENTICATE -1
 #define QB_IPC_MSG_NEW_EVENT_SOCK -2
 #define QB_IPC_MSG_DISCONNECT -3
 
 /* *INDENT-OFF* */
 #ifdef __cplusplus
 }
 #endif
 /* *INDENT-ON* */
 
 #endif /* QB_IPC_COMMON_H_DEFINED */