diff --git a/redisgraph/graph.py b/redisgraph/graph.py
index 04e3f04..dd0b8d8 100644
--- a/redisgraph/graph.py
+++ b/redisgraph/graph.py
@@ -90,7 +90,7 @@ def commit(self):
         query += ','.join([str(edge) for edge in self.edges])
 
         # Discard leading comma.
-        if query[-1] is ',':
+        if query[-1] == ',':
             query = query[:-1]
 
         return self.query(query)