diff --git a/Source/charon/ike_sa_id.h b/Source/charon/ike_sa_id.h
index 8b911a57b..3b83672be 100644
--- a/Source/charon/ike_sa_id.h
+++ b/Source/charon/ike_sa_id.h
@@ -24,6 +24,10 @@
 #ifndef IKE_SA_ID_H_
 #define IKE_SA_ID_H_
 
+#include <freeswan.h>
+#include <pluto/constants.h>
+#include <pluto/defs.h>
+
 #include "types.h"
 
 /**