diff --git a/Source/charon/types.h b/Source/charon/types.h
index 3ebc818a6..a65e387e5 100644
--- a/Source/charon/types.h
+++ b/Source/charon/types.h
@@ -28,7 +28,8 @@ typedef enum status_e {
 	SUCCESS,
 	FAILED,
 	OUT_OF_RES,
-	ALREADY_DONE
+	ALREADY_DONE,
+	NOT_SUPPORTED
 } status_t;
 
 typedef struct timeval timeval_t;