diff --git a/tools/check_chair.py b/tools/check_chair.py
index e9f3b5c8..123aca47 100644
--- a/tools/check_chair.py
+++ b/tools/check_chair.py
@@ -59,11 +59,21 @@ A tool that checks a meeting chair matches the canonical format.
     meetings = meeting.load_meetings(args.yaml_dir)
     return_code = 0
     for m in meetings:
-        ok, msg = check_chair(m.chair)
-        if not ok:
-            return_code = 1
-            print(m.filefrom)
-            print(msg.rstrip())
+        if m.chair is not None:
+            ok, msg = check_chair(m.chair)
+            if not ok:
+                return_code = 1
+                print(m.filefrom)
+                print(msg.rstrip())
+        for s in m.schedules:
+            if s.chair == m.chair:
+                # already checked
+                continue
+            ok, msg = check_chair(s.chair)
+            if not ok:
+                return_code = 1
+                print(m.filefrom)
+                print(msg.rstrip())
     return return_code