Index: wp-admin/includes/class-wp-users-list-table.php
===================================================================
--- wp-admin/includes/class-wp-users-list-table.php	(revision 18012)
+++ wp-admin/includes/class-wp-users-list-table.php	(working copy)
@@ -1,3 +1,4 @@
+
 <?php
 /**
  * Users List Table class.
@@ -112,7 +113,7 @@
 			$name = translate_user_role( $name );
 			/* translators: User role name with count */
 			$name = sprintf( __('%1$s <span class="count">(%2$s)</span>'), $name, $avail_roles[$this_role] );
-			$role_links[$this_role] = "<a href='" . esc_html( add_query_arg( 'role', $this_role, $url ) ) . "'$class>$name</a>";
+			$role_links[$this_role] = "<a href='" . esc_url( add_query_arg( 'role', $this_role, $url ) ) . "'$class>$name</a>";
 		}
 
 		return $role_links;