diff --git a/app/views/users/_statistics.html.erb b/app/views/users/_statistics.html.erb
index e426275fe..fae5374ab 100644
--- a/app/views/users/_statistics.html.erb
+++ b/app/views/users/_statistics.html.erb
@@ -14,9 +14,14 @@
         <tr>
           <th>Last IP</th>
           <td>
-            <%= link_to user.last_ip_addr, ip_addresses_path(search: { ip_addr: user.last_ip_addr }) %>
-            (<%= link_to "users", ip_addresses_path(search: { ip_addr: user.last_ip_addr, group_by: "user" }) %>,
-            <%= link_to "IPs", ip_addresses_path(search: { user_id: user.id, group_by: "ip_addr" }) %>)
+            <% if user.last_ip_addr.present? %>
+              <%= link_to user.last_ip_addr, ip_addresses_path(search: { ip_addr: user.last_ip_addr }) %>
+              (<%= link_to "users", ip_addresses_path(search: { ip_addr: user.last_ip_addr, group_by: "user" }) %>,
+              <%= link_to "IPs", ip_addresses_path(search: { user_id: user.id, group_by: "ip_addr" }) %>)
+            <% else %>
+              <em>unknown</em>
+              (<%= link_to "IPs", ip_addresses_path(search: { user_id: user.id, group_by: "ip_addr" }) %>)
+            <% end %>
           </td>
         </tr>
       <% end %>