diff --git a/source/sites/nhentai.d b/source/sites/nhentai.d
index ce1023d..ef2c4f0 100644
--- a/source/sites/nhentai.d
+++ b/source/sites/nhentai.d
@@ -88,7 +88,7 @@ class NHentai : BaseSite
 
         // Loop over the range in parallel to make it faster
         auto range = new int[pageNumber];
-        foreach(i; parallel(range))
+        foreach(i, ref element; parallel(range))
         {
             // Craft the url with all parameters
             string extractedUrl = imageUrl ~ contentIDMatch ~ "/" ~ to!string(i) ~ ".jpg";