diff --git a/plinth/modules/matrixsynapse/templates/matrix-synapse-pre-setup.html b/plinth/modules/matrixsynapse/templates/matrix-synapse-pre-setup.html
index 001d24bec..5dd737228 100644
--- a/plinth/modules/matrixsynapse/templates/matrix-synapse-pre-setup.html
+++ b/plinth/modules/matrixsynapse/templates/matrix-synapse-pre-setup.html
@@ -23,7 +23,7 @@
   </p>
 
   <div class="alert alert-warning" role="alert">
-    {% blocktrans %}
+    {% blocktrans trimmed %}
       <strong>Warning!</strong> Changing the domain name after this step will
       require uninstalling and reinstalling the app which will wipe app's data.
     {% endblocktrans %}