diff --git a/SDWebImage/SDWebImageManager.h b/SDWebImage/SDWebImageManager.h
index 6e1c57f3..53c7c5df 100644
--- a/SDWebImage/SDWebImageManager.h
+++ b/SDWebImage/SDWebImageManager.h
@@ -138,8 +138,8 @@ typedef void(^SDWebImageCompletedWithFinishedBlock)(UIImage *image, NSError *err
  *                       This block as no return value and takes the requested UIImage as first parameter.
  *                       In case of error the image parameter is nil and the second parameter may contain an NSError.
  *
- *                       The third parameter is a Boolean indicating if the image was retrived from the local cache
- *                       of from the network.
+ *                       The third parameter is an `SDImageCacheType` enum indicating if the image was retrived from
+ *                       the local cache or from the memory cache or from the network.
  *
  *                       The last parameter is set to NO when the SDWebImageProgressiveDownload option is used and
  *                       the image is downloading. This block is thus called repetidly with a partial image. When