diff --git a/templates/conditions/update.html b/templates/conditions/update.html
index 10dc2d4..653bf06 100644
--- a/templates/conditions/update.html
+++ b/templates/conditions/update.html
@@ -32,7 +32,7 @@
       <input type="number" step="any" name="value" value="{{ data.value }}">
 
       <label for="disabled">Disabled</label>
-      <input type="checkbox" name="disabled" value="{{ data.disabled }}">
+      <input type="checkbox" name="disabled" {{ "checked" if data.disabled }}>
     </fieldset>
     <fieldset>
       <button value="cancel" formmethod="dialog" onclick="window.top.postMessage('close', '*')">Cancel</button>