diff --git a/common/utils/ocp_itti/intertask_interface.cpp b/common/utils/ocp_itti/intertask_interface.cpp
index 3d4d356dcf..1680410ebb 100644
--- a/common/utils/ocp_itti/intertask_interface.cpp
+++ b/common/utils/ocp_itti/intertask_interface.cpp
@@ -80,7 +80,7 @@ task_list_t tasks[TASK_MAX];
 
   void *itti_malloc(task_id_t origin_task_id, task_id_t destination_task_id, ssize_t size) {
     void *ptr = NULL;
-    AssertFatal ((ptr=malloc (size)) != NULL, "Memory allocation of %zu bytes failed (%d -> %d)!\n",
+    AssertFatal ((ptr=calloc (size, 1)) != NULL, "Memory allocation of %zu bytes failed (%d -> %d)!\n",
                  size, origin_task_id, destination_task_id);
     return ptr;
   }
@@ -91,8 +91,16 @@ task_list_t tasks[TASK_MAX];
     return (EXIT_SUCCESS);
   }
 
+  // in the two following functions, the +32 in malloc is there to deal with gcc memory alignment
+  // because a struct size can be larger than sum(sizeof(struct components))
+  // We should remove the itti principle of a huge union for all types of messages in paramter "msg_t ittiMsg"
+  // to use a more C classical pointer casting "void * ittiMsg", later casted in the right struct
+  // but we would have to change all legacy macros, as per this example
+  // #define S1AP_REGISTER_ENB_REQ(mSGpTR)           (mSGpTR)->ittiMsg.s1ap_register_enb_req
+  // would become
+  // #define S1AP_REGISTER_ENB_REQ(mSGpTR)           (s1ap_register_enb_req) mSGpTR)->ittiMsg
   MessageDef *itti_alloc_new_message_sized(task_id_t origin_task_id, MessagesIds message_id, MessageHeaderSize size) {
-    MessageDef *temp = (MessageDef *)itti_malloc (origin_task_id, TASK_UNKNOWN, sizeof(MessageHeader) + size);
+    MessageDef *temp = (MessageDef *)itti_malloc (origin_task_id, TASK_UNKNOWN, sizeof(MessageHeader) +32 + size);
     temp->ittiMsgHeader.messageId = message_id;
     temp->ittiMsgHeader.originTaskId = origin_task_id;
     temp->ittiMsgHeader.ittiMsgSize = size;
@@ -100,7 +108,7 @@ task_list_t tasks[TASK_MAX];
   }
 
   MessageDef *itti_alloc_new_message(task_id_t origin_task_id, MessagesIds message_id) {
-    int size=sizeof(MessageHeader) + messages_info[message_id].size;
+    int size=sizeof(MessageHeader) + 32 + messages_info[message_id].size;
     MessageDef *temp = (MessageDef *)itti_malloc (origin_task_id, TASK_UNKNOWN, size);
     temp->ittiMsgHeader.messageId = message_id;
     temp->ittiMsgHeader.originTaskId = origin_task_id;