diff --git a/comments.php b/comments.php
index 9323f7756..3407910cc 100644
--- a/comments.php
+++ b/comments.php
@@ -541,7 +541,7 @@ SELECT *
 }
 
 $derivative_params = trigger_change('get_comments_derivative_params', ImageStdParams::get_by_type(IMG_THUMB) );
-$template->assign( 'derivative_params', $derivative_params );
+$template->assign( 'comment_derivative_params', $derivative_params );
 
 // include menubar
 $themeconf = $template->get_template_vars('themeconf');