diff --git a/src/iface.h b/src/iface.h
index be979b8..3f5dc3a 100644
--- a/src/iface.h
+++ b/src/iface.h
@@ -21,6 +21,7 @@ typedef char msgPoolSemId[4*MSGSPACE_ID_LEN];
 
 typedef char msgQueueDataId[4*MSGSPACE_ID_LEN];
 typedef char msgQueueId[4*MSGSPACE_ID_LEN];
+typedef char msgQueueElemId[4*MSGSPACE_ID_LEN];
 typedef char msgQueueSemId[4*MSGSPACE_ID_LEN];
 
   /* pid[] */
@@ -73,7 +74,7 @@ typedef struct MsgQueueElem {
   msgQueueElemId next;  
 } msgQueueElem;
 
-typedef struct MsgQueue{
+typedef struct MsgQueue {
   int elemCounter;
   msgQueueElemId head; 
   msgQueueElemId tail;