diff --git a/configure.phtml b/configure.phtml
index 910a4f9..87eac9b 100644
--- a/configure.phtml
+++ b/configure.phtml
@@ -7,7 +7,7 @@
   <div class="form-group">
     <label class="group-name" for="api_key"><?php echo _t('ext.kagiSummarizer.configure.api_key'); ?></label>
     <div class="group-controls">
-      <input type="text" name="api_key" id="api_key" value="<?php echo $kagi_api_key; ?>">
+      <input type="text" name="api_key" id="api_key" value="<?php echo $api_key; ?>">
     </div>
   </div>
   <div class="form-group form-actions">