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-rw-r--r--program/include/main.inc2
1 files changed, 1 insertions, 1 deletions
diff --git a/program/include/main.inc b/program/include/main.inc
index 921494829..ae7d50b9f 100644
--- a/program/include/main.inc
+++ b/program/include/main.inc
@@ -842,7 +842,7 @@ function rcube_charset_convert($str, $from, $to=NULL)
$from = strtoupper($from);
$to = $to==NULL ? strtoupper($GLOBALS['CHARSET']) : strtoupper($to);
- if ($from==$to || $str=='')
+ if ($from==$to || $str=='' || empty($from))
return $str;
// convert charset using mbstring module