diff --git a/demos/node-editor/help-window.ui b/demos/node-editor/help-window.ui
index 7feffb7c18..ad8f50c33e 100644
--- a/demos/node-editor/help-window.ui
+++ b/demos/node-editor/help-window.ui
@@ -13,6 +13,7 @@
             <property name="right-margin">20</property>
             <property name="top-margin">20</property>
             <property name="bottom-margin">20</property>
+            <property name="monospace">1</property>
             <property name="buffer">
               <object class="GtkTextBuffer" id="buffer"/>
             </property>