diff --git a/ext/upload/theme.php b/ext/upload/theme.php
index 11e0a0aa..f5aa649e 100644
--- a/ext/upload/theme.php
+++ b/ext/upload/theme.php
@@ -322,7 +322,7 @@ class UploadTheme extends Themelet {
 			<div class='mini_upload'>
 			".make_form(make_link("upload"), "POST", $multipart=True)."
 				$upload_list
-				<input name='tags' type='text' placeholder='tagme' class='autocomplete_tags'>
+				<input name='tags' type='text' placeholder='tagme' class='autocomplete_tags' required='required'>
 				<input type='submit' value='Post'>
 			</form>
 			<small>(Max file size is $max_kb)</small>