diff --git a/src/wp-includes/pluggable.php b/src/wp-includes/pluggable.php
index 02377203a2..639230f702 100644
--- a/src/wp-includes/pluggable.php
+++ b/src/wp-includes/pluggable.php
@@ -1190,7 +1190,7 @@ if ( !function_exists('wp_sanitize_redirect') ) :
  * @return string redirect-sanitized URL
  **/
 function wp_sanitize_redirect($location) {
-	$location = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%!*]|i', '', $location);
+	$location = preg_replace('|[^a-z0-9-~+_.?#=&;,/:%!*\[\]]|i', '', $location);
 	$location = wp_kses_no_null($location);
 
 	// remove %0d and %0a from location
diff --git a/tests/phpunit/tests/formatting/redirect.php b/tests/phpunit/tests/formatting/redirect.php
index cd9f0f2bd5..5da5f82dce 100644
--- a/tests/phpunit/tests/formatting/redirect.php
+++ b/tests/phpunit/tests/formatting/redirect.php
@@ -14,5 +14,7 @@ class Tests_Formatting_Redirect extends WP_UnitTestCase {
 		//Nesting checks
 		$this->assertEquals('http://example.com/watchthecarriagereturngo', wp_sanitize_redirect('http://example.com/watchthecarriagereturn%0%0ddgo'));
 		$this->assertEquals('http://example.com/watchthecarriagereturngo', wp_sanitize_redirect('http://example.com/watchthecarriagereturn%0%0DDgo'));
+		$this->assertEquals('http://example.com/whyisthisintheurl/?param[1]=foo', wp_sanitize_redirect('http://example.com/whyisthisintheurl/?param[1]=foo'));
+		$this->assertEquals('http://[2606:2800:220:6d:26bf:1447:aa7]/', wp_sanitize_redirect('http://[2606:2800:220:6d:26bf:1447:aa7]/'));
 	}
 }