diff --git a/ext/tag_list/theme.php b/ext/tag_list/theme.php
index b162076f..73163a96 100644
--- a/ext/tag_list/theme.php
+++ b/ext/tag_list/theme.php
@@ -118,7 +118,9 @@ class TagListTheme extends Themelet
         }
 
         if ($config->get_string('tag_list_image_type')=="tags") {
-            $page->add_block(new Block("Tags", $main_html, "left", 10));
+            if ($main_html != null) {
+                $page->add_block(new Block("Tags", $main_html, "left", 10));
+            }
         } else {
             $page->add_block(new Block("Related Tags", $main_html, "left", 10));
         }