diff --git a/app/views/notifications/index.html.erb b/app/views/notifications/index.html.erb
index e965f481..ec9987f6 100644
--- a/app/views/notifications/index.html.erb
+++ b/app/views/notifications/index.html.erb
@@ -37,13 +37,13 @@
                     map = notification.notified_object.map %>
                     added topic <span class="in-bold"><%= topic.name %></span> to map <span class="in-bold"><%= map.name %></span>
                   <% when TOPIC_CONNECTED_1 %>
-                    <% topic1 = notification.notified_object.topic1
-                    topic2 = notification.notified_object.topic2 %>
-                    connected <span class="in-bold"><%= topic1.name %></span> to <span class="in-bold"><%= topic2.name %></span>
+                    <% topic1 = notification.notified_object&.topic1 %>
+                    <% topic2 = notification.notified_object&.topic2 %>
+                    connected <span class="in-bold"><%= topic1&.name %></span> to <span class="in-bold"><%= topic2&.name %></span>
                   <% when TOPIC_CONNECTED_2 %>
-                    <% topic1 = notification.notified_object.topic1
-                    topic2 = notification.notified_object.topic2 %>
-                    connected <span class="in-bold"><%= topic2.name %></span> to <span class="in-bold"><%= topic1.name %></span>
+                    <% topic1 = notification.notified_object&.topic1 %>
+                    <% topic2 = notification.notified_object&.topic2 %>
+                    connected <span class="in-bold"><%= topic2&.name %></span> to <span class="in-bold"><%= topic1&.name %></span>
                   <% when MESSAGE_FROM_DEVS %>
                     <%= notification.subject %>
               <% end %>