diff --git a/wp-includes/classes.php b/wp-includes/classes.php
index 7519fb4982..911722daae 100644
--- a/wp-includes/classes.php
+++ b/wp-includes/classes.php
@@ -1331,7 +1331,7 @@ class Walker_Category extends Walker {
 		if ( $use_desc_for_title == 0 || empty($category->description) )
 			$link .= 'title="' . sprintf(__( 'View all posts filed under %s' ), $cat_name) . '"';
 		else
-			$link .= 'title="' . esc_attr( apply_filters( 'category_description', $category->description, $category )) . '"';
+			$link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
 		$link .= '>';
 		$link .= $cat_name . '</a>';