1 files changed, 1 insertions, 1 deletions

diff --git a/bitbake/lib/toaster/bldcontrol/management/commands/loadconf.py b/bitbake/lib/toaster/bldcontrol/management/commands/loadconf.py
index 2257a7143b..e2f61e4cb4 100644
--- a/bitbake/lib/toaster/bldcontrol/management/commands/loadconf.py
+++ b/bitbake/lib/toaster/bldcontrol/management/commands/loadconf.py
@@ -22,7 +22,7 @@ def _get_id_for_sourcetype(s):
     for i in LayerSource.SOURCE_TYPE:
         if s == i[1]:
             return i[0]
-    raise Exception("Could not find definition for sourcetype " + s)
+    raise Exception("Could not find definition for sourcetype '%s'. Valid source types are %s" % (str(s), ', '.join(map(lambda x: "'%s'" % x[1], LayerSource.SOURCE_TYPE ))))
 
 class Command(BaseCommand):
     help = "Loads a toasterconf.json file in the database"