diff --git a/flandmark/script/annotate.py b/flandmark/script/annotate.py
index c39ba75c5b04849ccc46907ffd81529bdaf186b9..c565189b3fab49b1ddcae26683618c99e02e8a0b 100644
--- a/flandmark/script/annotate.py
+++ b/flandmark/script/annotate.py
@@ -97,6 +97,7 @@ def main():
       try:
         os.makedirs(dirname)
       except OSError as exc:
+        import errno
         if exc.errno == errno.EEXIST: pass
         else: raise