diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58fb4ca6..acfb619c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Adminer dev
 - SQL command: Unlink NULL primary keys
+- MySQL: Fix displaying routine definition (bug #1156, regression from 5.4.0)
 
 ## Adminer 5.4.0 (released 2025-09-08)
 - Allow specifying operator in search anywhere
@@ -28,7 +29,7 @@
 - PostgreSQL: Fix calling functions returing table
 - PostgreSQL: Don't treat user types containing 'file' as blobs (bug #1118)
 - PostgreSQL: Export DROP and CREATE DATABASE (bug #1140)
-- PostgreSQL 11-: Avoid duplicate oid in table status (bug #1089)
+- PostgreSQL 11-: Avoid duplicate oid in table status (bug #1089, regression from 5.3.0)
 - Elasticsearch: Support dropping aliases
 - Plugins: Methods afterConnect(), processList() and killProcess()
 - New plugin: Display row numbers in select (bug #1106)
diff --git a/adminer/drivers/mysql.inc.php b/adminer/drivers/mysql.inc.php
index b731772b..1b09759d 100644
--- a/adminer/drivers/mysql.inc.php
+++ b/adminer/drivers/mysql.inc.php
@@ -897,7 +897,7 @@ if (!defined('Adminer\DRIVER')) {
 		$space = "(?:\\s|/\\*[\s\S]*?\\*/|(?:#|-- )[^\n]*\n?|--\r?\n)";
 		$enum = driver()->enumLength;
 		$type_pattern = "((" . implode("|", array_merge(array_keys(driver()->types()), $aliases)) . ")\\b(?:\\s*\\(((?:[^'\")]|$enum)++)\\))?"
-			. "\\s*(zerofill\\s*)?(unsigned(?:\\s+zerofill)?)?)(?:\\s*(?:CHARSET|CHARACTER\\s+SET)\\s*['\"]?([^'\"\\s,]+)['\"]?)?(?:\\s*COLLATE\\s*['\"]?([^'\"\\s,]+)['\"]?)?"; //! store COLLATE
+			. "\\s*(zerofill\\s*)?(unsigned(?:\\s+zerofill)?)?)(?:\\s*(?:CHARSET|CHARACTER\\s+SET)\\s*['\"]?([^'\"\\s,]+)['\"]?)?(?:\\s*COLLATE\\s*['\"]?(?:[^'\"\\s,]+)['\"]?)?"; //! store COLLATE
 		$pattern = "$space*(" . ($type == "FUNCTION" ? "" : driver()->inout) . ")?\\s*(?:`((?:[^`]|``)*)`\\s*|\\b(\\S+)\\s+)$type_pattern";
 		$create = get_val("SHOW CREATE $type " . idf_escape($name), 2);
 		preg_match("~\\(((?:$pattern\\s*,?)*)\\)\\s*" . ($type == "FUNCTION" ? "RETURNS\\s+$type_pattern\\s+" : "") . "(.*)~is", $create, $match);