diff --git a/GPy/core/parameterization/index_operations.py b/GPy/core/parameterization/index_operations.py
index 891ac522..12b3a298 100644
--- a/GPy/core/parameterization/index_operations.py
+++ b/GPy/core/parameterization/index_operations.py
@@ -192,6 +192,9 @@ class ParameterIndexOperationsView(object):
         ind = self._filter_index(self._param_index_ops[prop])
         return ind
 
+    def __delitem__(self, prop):
+        self.remove(prop, self[prop])
+
     def __str__(self, *args, **kwargs):
         import pprint
         return pprint.pformat(dict(self.iteritems()))