diff --git a/classes/Mail.php b/classes/Mail.php
index 3b09a85f7..58cbcb3fc 100644
--- a/classes/Mail.php
+++ b/classes/Mail.php
@@ -325,7 +325,7 @@ class MailCore
 
 		if (!is_array($_LANGMAIL))
 			return (str_replace('"', '"', $string));
-		if (array_key_exists($key, $_LANGMAIL))
+		if (array_key_exists($key, $_LANGMAIL) && !empty($_LANGMAIL[$key]))
 			$str = $_LANGMAIL[$key];
 		else
 			$str = $string;