diff --git a/geopandas/_compat.py b/geopandas/_compat.py
index 3883770..0b9c2fc 100644
--- a/geopandas/_compat.py
+++ b/geopandas/_compat.py
@@ -1,5 +1,6 @@
 from distutils.version import LooseVersion
 import os
+import warnings
 
 import pandas as pd