diff --git a/src/Content/Text/BBCode.php b/src/Content/Text/BBCode.php
index d545492bb..5b0aa2cff 100644
--- a/src/Content/Text/BBCode.php
+++ b/src/Content/Text/BBCode.php
@@ -1292,13 +1292,17 @@ class BBCode extends BaseObject
 
 	private static function textHighlightCallback($match)
 	{
+		// Fallback in case the language doesn't exist
+		$return = '[code]' . $match[2] . '[/code]';
+
 		if (in_array(strtolower($match[1]),
 				['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
 				'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh', 'bash'])
 		) {
-			return text_highlight($match[2], strtolower($match[1]));
+			$return = text_highlight($match[2], strtolower($match[1]));
 		}
-		return $match[0];
+
+		return $return;
 	}
 
 	/**