diff --git a/notifications/templates/mail/bulk.html b/notifications/templates/mail/bulk.html
index c8515ed361a..a5c99a1da45 100644
--- a/notifications/templates/mail/bulk.html
+++ b/notifications/templates/mail/bulk.html
@@ -29,13 +29,13 @@
                         <td style="padding: 0; vertical-align: middle;">
                             <div class="mobile_event_marker_bulk"
                                  style="{{ macros.event_marker_bulk_style() }};
-                                        {% if service_notification %} {{ state_mapping[entry.PREVIOUSSERVICEHARDSTATE] }} {% else %} {{ state_mapping[entry.PREVIOUSHOSTHARDSTATE] }} {% endif %};
+                                        {% if service_notification %} {{ state_mapping[(entry.PREVIOUSSERVICEHARDSTATE|default('UNKNOWN'))] }} {% else %} {{ state_mapping[(entry.PREVIOUSHOSTHARDSTATE|default('UNKNOWN'))] }} {% endif %};
                                         display: inline-block;
                                         /* Inline block to respect width */">
                                 {% if service_notification %}
-                                    {{ entry.PREVIOUSSERVICEHARDSTATE[:4] }}
+                                    {{ (entry.PREVIOUSSERVICEHARDSTATE|default("NULL"))[:4] }}
                                 {% else %}
-                                    {{ entry.PREVIOUSHOSTHARDSTATE[:4] }}
+                                    {{ (entry.PREVIOUSHOSTHARDSTATE|default("NULL"))[:4] }}
                                 {% endif %}
                             </div>
                         </td>
diff --git a/notifications/templates/mail/summary.html b/notifications/templates/mail/summary.html
index 9947774677f..49e23163192 100644
--- a/notifications/templates/mail/summary.html
+++ b/notifications/templates/mail/summary.html
@@ -33,13 +33,13 @@
                             <tr>
                                 <td style=" line-height: 45px; padding: 0; ">
                                     <div style="{{ macros.event_marker_style() }};
-                                                {% if service_notification %} {{ state_mapping[data.PREVIOUSSERVICEHARDSTATE] }} {% else %} {{ state_mapping[data.PREVIOUSHOSTHARDSTATE] }} {% endif %};
+                                                {% if service_notification %} {{ state_mapping[(data.PREVIOUSSERVICEHARDSTATE|default('UNKNOWN'))] }} {% else %} {{ state_mapping[(data.PREVIOUSHOSTHARDSTATE|default('UNKNOWN'))] }} {% endif %};
                                                 display: inline-block;
                                                 /* Inline block to respect width */">
                                         {% if service_notification %}
-                                            {{ data.PREVIOUSSERVICEHARDSTATE[:4] }}
+                                            {{ (data.PREVIOUSSERVICEHARDSTATE|default("NULL"))[:4] }}
                                         {% else %}
-                                            {{ data.PREVIOUSHOSTHARDSHORTSTATE[:4] }}
+                                            {{ (data.PREVIOUSHOSTHARDSHORTSTATE|default("NULL"))[:4] }}
                                         {% endif %}
                                     </div>
                                 </td>