diff --git a/src/libstrongswan/utils.h b/src/libstrongswan/utils.h
old mode 100644
new mode 100755
index e5e4a10c0..826477c7f
--- a/src/libstrongswan/utils.h
+++ b/src/libstrongswan/utils.h
@@ -299,6 +299,11 @@ enum status_t {
 	 * Another call to the method is required.
 	 */
 	NEED_MORE,
+
+	/**
+	 * Call failed, send error to other side.
+	 */
+	FAILED_SEND_ERROR,
 };
 
 /**