diff --git a/openair2/COMMON/x2ap_messages_types.h b/openair2/COMMON/x2ap_messages_types.h
index 11a6c9dac5..7cdd0ff0ff 100644
--- a/openair2/COMMON/x2ap_messages_types.h
+++ b/openair2/COMMON/x2ap_messages_types.h
@@ -22,6 +22,7 @@
 #ifndef X2AP_MESSAGES_TYPES_H_
 #define X2AP_MESSAGES_TYPES_H_
 
+#include "s1ap_messages_types.h"
 #include "LTE_PhysCellId.h"
 
 //-------------------------------------------------------------------------------------------//
diff --git a/openair2/RRC/LTE/rrc_proto.h b/openair2/RRC/LTE/rrc_proto.h
index 8e9cba3fb0..e3b3d0c331 100644
--- a/openair2/RRC/LTE/rrc_proto.h
+++ b/openair2/RRC/LTE/rrc_proto.h
@@ -32,7 +32,7 @@
  */
 
 #include "RRC/LTE/rrc_defs.h"
-
+#include "x2ap_messages_types.h"
 #include "flexran_agent_extern.h"
 
 //main.c