diff --git a/classes/srcrev-update.bbclass b/classes/srcrev-update.bbclass
index 880af30..01ed8a2 100644
--- a/classes/srcrev-update.bbclass
+++ b/classes/srcrev-update.bbclass
@@ -16,6 +16,7 @@ python do_srcrev_update() {
     if len(scms) == 0:
         return
 
+    d.setVar("__BBSEENSRCREV", "1")
     for scm in scms:
         ud = urldata[scm]
         for name in ud.names: