diff --git a/geopandas/geocode.py b/geopandas/geocode.py
index 1f39ae7..0e9b3e7 100644
--- a/geopandas/geocode.py
+++ b/geopandas/geocode.py
@@ -93,7 +93,7 @@ def _prepare_geocode_result(results):
             p = Point(loc[1], loc[0])
 
         if address is None:
-            address = pd.np.nan
+            address = np.nan
 
         d['geometry'].append(p)
         d['address'].append(address)