diff --git a/src/nzg_allocate.c b/src/nzg_allocate.c
index c3b66af..34dc422 100644
--- a/src/nzg_allocate.c
+++ b/src/nzg_allocate.c
@@ -116,7 +116,7 @@ void * msgAllocate(msgSpace *space,
 	  /* on cherche le pool avec le moins de lock poses / nbre de buffer
 	   * le numéro du pool est stocké dans idxPoolOptimum */
 	  for(i=0; i<nbLockedSem; i++) {
-		printf("Coef %d : %d\n",i,semPoolCoef[i]);
+		printf("Coef %d : %d\n",i,(int)semPoolCoef[i]);
 		if ((semPoolCoef[i] != -1) 
 			&& (semPoolCoef[i] < minPoolCoef)) {
 		  minPoolCoef = semPoolCoef[i];
diff --git a/src/nzg_iface.h b/src/nzg_iface.h
index e3d0982..68e5aca 100644
--- a/src/nzg_iface.h
+++ b/src/nzg_iface.h
@@ -54,15 +54,17 @@ typedef struct MsgSpace {
 } msgSpace;
 
 
-/* struct msgSpaceListElem * next; */
-
 typedef struct MsgSpaceListElem {
 //  void * id;
   int ownerPid;
-  msgSpaceListId idList;
-  msgSpaceListElemId idListElem;
-} * msgSpaceList, msgSpaceListElem;
+  msgSpaceListElemId next;
+} msgSpaceListElem;
 
+typedef struct MsgSpaceList {
+  int elemCounter;
+  msgSpaceListElemId first;
+  msgSpaceListElemId last;
+} msgSpaceList, 
 
 #endif
 /* */