diff --git a/camelot/parsers/base.py b/camelot/parsers/base.py
index 16eb083..0c1b54b 100644
--- a/camelot/parsers/base.py
+++ b/camelot/parsers/base.py
@@ -1,3 +1,5 @@
+import os
+
 from ..core import Geometry
 from ..utils import get_page_layout, get_text_objects