1 files changed, 2 insertions, 2 deletions

diff --git a/modules/private/buildbot/common/build_helpers.py b/modules/private/buildbot/common/build_helpers.py
index 384b1ac..ed7ada3 100644
--- a/modules/private/buildbot/common/build_helpers.py
+++ b/modules/private/buildbot/common/build_helpers.py
@@ -115,7 +115,7 @@ class SlackStatusPush(HttpStatusPushBase):
             msg = "{} environment".format(build["properties"]["environment"][0])
             if "build" in build["properties"]:
                 msg = "of archive {} in ".format(build["properties"]["build"][0]) + msg
-        elif len(build["buildset"]["sourcestamps"][0]["branch"]) > 0:
+        elif len(build["buildset"]["sourcestamps"][0]["branch"] or []) > 0:
             msg = "revision {}".format(build["buildset"]["sourcestamps"][0]["branch"])
         else:
             msg = "build"
@@ -223,7 +223,7 @@ class XMPPStatusPush(HttpStatusPushBase):
             msg = "{} environment".format(build["properties"]["environment"][0])
             if "build" in build["properties"]:
                 msg = "of archive {} in ".format(build["properties"]["build"][0]) + msg
-        elif len(build["buildset"]["sourcestamps"][0]["branch"]) > 0:
+        elif len(build["buildset"]["sourcestamps"][0]["branch"] or []) > 0:
             msg = "revision {}".format(build["buildset"]["sourcestamps"][0]["branch"])
         else:
             msg = "build"