diff --git a/system/docs/CHANGELOG.md b/system/docs/CHANGELOG.md
index ed16e177b1..9110f47538 100644
--- a/system/docs/CHANGELOG.md
+++ b/system/docs/CHANGELOG.md
@@ -4,6 +4,9 @@ Contao Open Source CMS changelog
 Version 3.5.26 (2017-XX-XX)
 ---------------------------
 
+### Fixed
+Remove the UTF-8 BOM when combining files (see #8689).
+
 ### Fixed
 Do not add the CORS headers in the install tool (see #8681).
 
diff --git a/system/modules/core/library/Contao/Combiner.php b/system/modules/core/library/Contao/Combiner.php
index a9123e996f..9523abddb5 100644
--- a/system/modules/core/library/Contao/Combiner.php
+++ b/system/modules/core/library/Contao/Combiner.php
@@ -263,6 +263,12 @@ public function getCombinedFile($strUrl=null)
 		{
 			$content = file_get_contents(TL_ROOT . '/' . $arrFile['name']);
 
+			// Remove UTF-8 BOM
+			if (strncmp($content, "\xEF\xBB\xBF", 3) === 0)
+			{
+				$content = substr($content, 3);
+			}
+
 			// HOOK: modify the file content
 			if (isset($GLOBALS['TL_HOOKS']['getCombinedFile']) && is_array($GLOBALS['TL_HOOKS']['getCombinedFile']))
 			{