diff --git a/common/utils/itti/intertask_interface_types.h b/common/utils/itti/intertask_interface_types.h
index d2bc0045459bf033aa9669576d9e83801923a5ee..019dd621e6a92b1257f104070941279dba6ddbfa 100644
--- a/common/utils/itti/intertask_interface_types.h
+++ b/common/utils/itti/intertask_interface_types.h
@@ -37,7 +37,7 @@
 #ifndef INTERTASK_INTERFACE_TYPES_H_
 #define INTERTASK_INTERFACE_TYPES_H_
 
-#include <stdint.h>
+#include "itti_types.h"
 
 /* Defines to handle bit fields on unsigned long values */
 #define UL_BIT_MASK(lENGTH)             ((1UL << (lENGTH)) - 1UL)
@@ -120,10 +120,6 @@ typedef union msg_s
 #undef MESSAGE_DEF
 } msg_t;
 
-#define INSTANCE_DEFAULT    (UINT16_MAX - 1)
-#define INSTANCE_ALL        (UINT16_MAX)
-
-typedef uint16_t instance_t;
 typedef uint16_t MessageHeaderSize;
 
 typedef struct itti_lte_time_s
diff --git a/common/utils/itti/itti_types.h b/common/utils/itti/itti_types.h
index 83e6cbeb7d2638b3daa159ddc07a52916db588c6..1ed1008fb914c0c4418dcac27594dcaa4de64800 100644
--- a/common/utils/itti/itti_types.h
+++ b/common/utils/itti/itti_types.h
@@ -36,6 +36,8 @@
 #ifndef _ITTI_TYPES_H_
 #define _ITTI_TYPES_H_
 
+#include <stdint.h>
+
 #define CHARS_TO_UINT32(c1, c2, c3, c4) (((c4) << 24) | ((c3) << 16) | ((c2) << 8) | (c1))
 
 #define MESSAGE_NUMBER_CHAR_FORMAT      "%11u"