diff --git a/amboar/obmc-scripts/maintainers/obmc-gerrit b/amboar/obmc-scripts/maintainers/obmc-gerrit
index a52abbc..800e561 100755
--- a/amboar/obmc-scripts/maintainers/obmc-gerrit
+++ b/amboar/obmc-scripts/maintainers/obmc-gerrit
@@ -21,6 +21,8 @@
     if not root:
         root = git('rev-parse', '--show-toplevel').strip()
     mfile = os.path.join(root, mname)
+    if not os.path.exists(mfile):
+        return reviewers
     with open(mfile, 'r') as mstream:
         maintainers.trash_preamble(mstream)
         block = maintainers.parse_block(mstream)
@@ -43,6 +45,8 @@
 
 def decorate_refspec(refspec: str) -> str:
     gargs = gerrit_refspec_args(get_reviewers())
+    if not gargs:
+        return refspec
     if '%' in refspec:
         return "{},{}".format(refspec, gargs)
     return "{}%{}".format(refspec, gargs)