diff --git a/site_utils/suite_scheduler/board_enumerator.py b/site_utils/suite_scheduler/board_enumerator.py
index 3ff08ae..1cb100d 100644
--- a/site_utils/suite_scheduler/board_enumerator.py
+++ b/site_utils/suite_scheduler/board_enumerator.py
@@ -59,6 +59,10 @@
 
         # Filter out all board labels tailing with -number, which is used for
         # testbed only.
-        label_names = set([re.match(r'(.*?)(?:-\d+)?$', l.name).group(1)
-                           for l in labels])
+        label_names = set()
+        for l in labels:
+            matcher = re.match(r'(.*?)(?:-\d+)?$', l.name)
+            if matcher is not None:
+                label_names.add(matcher.group(1))
+
         return map(lambda l: l.split(':', 1)[1], label_names)