diff --git a/src/wp-includes/formatting.php b/src/wp-includes/formatting.php
index 904c99b17b..5d6813c27b 100644
--- a/src/wp-includes/formatting.php
+++ b/src/wp-includes/formatting.php
@@ -1169,10 +1169,15 @@ function convert_chars($content, $deprecated = '') {
  * @return string Balanced text
  */
 function balanceTags( $text, $force = false ) {
-	if ( $force || get_option('use_balanceTags') == 1 )
-		return force_balance_tags( $text );
-	else
-		return $text;
+	if ( $force || get_option('use_balanceTags') == 1 ) {
+		$balance_tags_delimiters = apply_filters( 'balance_tags_delimiters', array( '<!--more.*?-->', '<!--nextpage-->' ) ); 
+		// Capture lets PREG_SPLIT_DELIM_CAPTURE return the delimiters
+		$delimiters_regex = '/(' . implode( '|', $balance_tags_delimiters ) . ')/';
+		$parts = preg_split( $delimiters_regex, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
+		return implode( '', array_map( 'force_balance_tags', $parts ) );
+	}
+
+	return $text;
 }
 
 /**