diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 20a64628a..3cfe1f8fb 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -39,6 +39,7 @@ Changelog
  * Fix: Invalid images no longer crash the image listing (Maris Serzans)
  * Fix: `MenuItem` `url` parameter can now take a lazy URL (Adon Metcalfe, rayrayndwiga)
  * Fix: Added missing translation tag to InlinePanel 'Add' button (jnns)
+ * Fix: Added missing translation tag to 'Signing in...' button text (Eugene MechanisM)
  * Fix: Restored correct highlighting behaviour of rich text toolbar buttons
  * Fix: Rendering a missing image through ImageChooserBlock no longer breaks the whole page (Christian Peters)
  * Fix: Filtering by popular tag in the image chooser now works when using the database search backend
diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index f95cd750a..32765bfb9 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -92,6 +92,7 @@ Contributors
 * rayrayndwiga
 * Rich Atkinson
 * jnns
+* Eugene MechanisM
 
 
 Translators
diff --git a/docs/releases/1.3.rst b/docs/releases/1.3.rst
index fbf738250..1c23c2e6d 100644
--- a/docs/releases/1.3.rst
+++ b/docs/releases/1.3.rst
@@ -89,6 +89,7 @@ Bug fixes
  * Invalid images no longer crash the image listing (Maris Serzans)
  * ``MenuItem`` ``url`` parameter can now take a lazy URL (Adon Metcalfe, rayrayndwiga)
  * Added missing translation tag to InlinePanel 'Add' button (jnns)
+ * Added missing translation tag to 'Signing in...' button text (Eugene MechanisM)
  * Restored correct highlighting behaviour of rich text toolbar buttons
  * Rendering a missing image through ImageChooserBlock no longer breaks the whole page (Christian Peters)
  * Filtering by popular tag in the image chooser now works when using the database search backend
diff --git a/wagtail/wagtailadmin/templates/wagtailadmin/login.html b/wagtail/wagtailadmin/templates/wagtailadmin/login.html
index d5acef41d..a3473c224 100644
--- a/wagtail/wagtailadmin/templates/wagtailadmin/login.html
+++ b/wagtail/wagtailadmin/templates/wagtailadmin/login.html
@@ -58,7 +58,7 @@
                     </li>
                 {% endcomment %}
                 <li class="submit">
-                    <button type="submit" class="button-longrunning" tabindex="3" data-clicked-text="Signing in..."><span class="icon icon-spinner"></span><em>{% trans 'Sign in' %}</em></button>
+                    <button type="submit" class="button-longrunning" tabindex="3" data-clicked-text="{% trans 'Signing in...' %}"><span class="icon icon-spinner"></span><em>{% trans 'Sign in' %}</em></button>
                 </li>
             </ul>
         </form>