diff --git a/src/wp-includes/class-wp-query.php b/src/wp-includes/class-wp-query.php
index 662a5b108b..3d7374cf93 100644
--- a/src/wp-includes/class-wp-query.php
+++ b/src/wp-includes/class-wp-query.php
@@ -2629,8 +2629,10 @@ class WP_Query {
 				 */
 				$climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option( 'posts_per_rss' ), &$this ) );
 			}
+
 			$cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : '';
 			$corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : '';
+			$climits  = ( ! empty( $climits ) ) ? $climits : '';
 
 			$comments = (array) $wpdb->get_results( "SELECT $distinct {$wpdb->comments}.* FROM {$wpdb->comments} $cjoin $cwhere $cgroupby $corderby $climits" );
 			// Convert to WP_Comment