diff --git a/GPy/kern/_src/kern.py b/GPy/kern/_src/kern.py
index 52745ddf..d5482b80 100644
--- a/GPy/kern/_src/kern.py
+++ b/GPy/kern/_src/kern.py
@@ -180,7 +180,7 @@ class Kern(Parameterized):
     def __iadd__(self, other):
         return self.add(other)
 
-    def add(self, other, name='add'):
+    def add(self, other, name='sum'):
         """
         Add another kernel to this one.