diff --git a/apimanager/metrics/views.py b/apimanager/metrics/views.py
index c9ae87e2..d7623a35 100644
--- a/apimanager/metrics/views.py
+++ b/apimanager/metrics/views.py
@@ -143,6 +143,8 @@ def get_metrics(self, cleaned_data):
             metrics = self.to_django(metrics['metrics'])
         except APIError as err:
             error_once_only(self.request, err)
+        except KeyError as err:
+            error_once_only(self.request, err)
         return metrics
 
     def get_context_data(self, **kwargs):