diff --git a/extension/data/modules/modnotes.jsx b/extension/data/modules/modnotes.jsx
index aa1dd4aef..199bdffad 100644
--- a/extension/data/modules/modnotes.jsx
+++ b/extension/data/modules/modnotes.jsx
@@ -445,7 +445,7 @@ function ModNotesPopup ({
                 className='tb-action-button tb-modnote-label-select'
                 defaultValue={defaultNoteLabelValueToLabelType[defaultNoteLabel]}
             >
-                <option value={undefined}>(no label)</option>
+                <option value=''>(no label)</option>
                 {Object.entries(labelNames).reverse().map(([value, name]) => (
                     <option key={value} value={value}>{name}</option>
                 ))}