diff --git a/mate-base/mate-session-manager/metadata.xml b/mate-base/mate-session-manager/metadata.xml
index 9a1a3483ec58f..2a87982eeb67c 100644
--- a/mate-base/mate-session-manager/metadata.xml
+++ b/mate-base/mate-session-manager/metadata.xml
@@ -7,6 +7,7 @@
     </maintainer>
 	<use>
 		<flag name="gtk3">Build with GTK+3 instead of GTK+2</flag>
+		<flag name="xtrans">Build with Xtrans support</flag>
 	</use>
     <upstream>
         <remote-id type="github">mate-desktop/mate-session-manager</remote-id>