diff --git a/src/queueLock.c b/src/queueLock.c
index 879af78..2c18bfe 100644
--- a/src/queueLock.c
+++ b/src/queueLock.c
@@ -1,14 +1,25 @@
 #include "libnazgul.h"
 
-int queueLock(msgSpaceId spaceid,int queueIdx){
+int queueLock(msgSpaceId externId,int queueIdx){
   sem_t * queueSemFd;
   msgQueueSemId queueSemId;
 
-  queueSemFd=sem_open(queueSemId,O_CREAT|O_EXCL,0666,1);
+  msgQueueSemIdIntern(queueSemId,externId);
+  queueSemFd=sem_open(queueSemId,O_CREAT|O_EXCL,SEM_DEFAULT_MODE,1);
   if(queueSemFd==SEM_FAILED){
-				NZG_ERROR("sem_open",queueSemId);
-				return -1;
-		}
-  return -1;
+	NZG_ERROR("sem_open",queueSemId);
+	goto ERROR;
+  }
+
+  if(sem_wait(queueSemFd)==-1){
+	NZG_ERROR("sem_wait",queueSemId);
+	goto ERROR;
+  }
+
+  sem_close(queueSemFd);
+
+  return 0;
+ERROR:
+  return -1; 
 }