diff --git a/src/Fetch/MIME.php b/src/Fetch/MIME.php
index b63d72b..4f21616 100644
--- a/src/Fetch/MIME.php
+++ b/src/Fetch/MIME.php
@@ -37,7 +37,12 @@ public static function decode($text, $targetCharset = 'utf-8')
         foreach (imap_mime_header_decode($text) as $word) {
             $ch = 'default' === $word->charset ? 'ascii' : $word->charset;
 
-            $result .= iconv($ch, $targetCharset, $word->text);
+            if (strtoupper($ch) != strtoupper($targetCharset)) {
+                $result .= iconv($ch, $targetCharset, $word->text);
+            }
+            else {
+                $result .= $word->text;
+            }
         }
 
         return $result;