diff --git a/gaiaapiclient/cone_search.py b/gaiaapiclient/cone_search.py
index 8dbca70..c218c9c 100644
--- a/gaiaapiclient/cone_search.py
+++ b/gaiaapiclient/cone_search.py
@@ -11,7 +11,7 @@ def query(ra, dec, radius, order):
     params = {
         'ra' : ra,
         'dec' : dec,
-        'radius' : radius
+        'radius' : radius,
         'order' : order
     }
     response = requests.get(url, params=params)