diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index 34e3364..6eee2a4 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -26,6 +26,8 @@ extern "C" {
 #define SLBT_ERROR			0x02
 
 enum slbt_custom_error {
+	SLBT_ERR_FLOW_ERROR,
+	SLBT_ERR_FLEE_ERROR,
 	SLBT_ERR_ARCHIVE_IMPORT,
 	SLBT_ERR_HOST_INIT,
 	SLBT_ERR_INSTALL_FAIL,