diff --git a/python/example_robot_data/robots_loader.py b/python/example_robot_data/robots_loader.py
index c63b7dbdbdba2d3d37f8e965dd6cf4e9368998c7..09be2aa120a5e230d3ddbffc0f14926a207f46bc 100644
--- a/python/example_robot_data/robots_loader.py
+++ b/python/example_robot_data/robots_loader.py
@@ -101,7 +101,7 @@ class RobotLoader(object):
 
 class A1Loader(RobotLoader):
     path = 'a1_description'
-    urdf_filename= "a1.urdf"
+    urdf_filename = "a1.urdf"
     urdf_subpath = "urdf"
     srdf_filename = "a1.srdf"
     ref_posture = "standing"