diff --git a/lib/helper.php b/lib/helper.php
index 908a61b5a2..2c221ddf19 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -661,7 +661,7 @@ class OC_Helper {
 		$length = mb_strlen($search, $encoding);
 		while(($i = mb_strrpos($subject, $search, $offset, $encoding)) !== false ) {
 			$subject = OC_Helper::mb_substr_replace($subject, $replace, $i, $length);
-			$offset = $i - mb_strlen($subject, $encoding) - 1;
+			$offset = $i - mb_strlen($subject, $encoding);
 			$count++;
 		}
 		return $subject;