diff --git a/graphspace_python/api/client.py b/graphspace_python/api/client.py
index ab74371..b12d265 100644
--- a/graphspace_python/api/client.py
+++ b/graphspace_python/api/client.py
@@ -71,7 +71,7 @@ def _add_instance_methods(self, instance_methods):
 		 		instance of the bound method.
 		"""
 		for method in instance_methods:
-			if method[0][0] is not '_':
+			if method[0][0] != '_':
 				self.__setattr__(method[0], method[1])
 
 	def set_api_host(self, host):