diff --git a/src/MbWrapper.php b/src/MbWrapper.php
index 3c7cea6..aff9cb5 100644
--- a/src/MbWrapper.php
+++ b/src/MbWrapper.php
@@ -334,6 +334,7 @@ private function getNormalizedCharset($charset)
      */
     public function convert($str, $fromCharset, $toCharset)
     {
+
         // there may be some mb-supported encodings not supported by iconv (on my libiconv for instance
         // HZ isn't supported), and so it may happen that failing an mb_convert_encoding, an iconv
         // may also fail even though both support an encoding separately.
@@ -341,6 +342,11 @@ public function convert($str, $fromCharset, $toCharset)
         
         $from = $this->getMbCharset($fromCharset);
         $to = $this->getMbCharset($toCharset);
+        
+        // Skip conversion if charset is the same
+        if ($from === $to) {
+            return $str;
+        }
 
         if ($str !== '') {
             if ($from !== false && $to === false) {