diff --git a/phpFlickr.php b/phpFlickr.php
index 975371e..ac7bfd4 100644
--- a/phpFlickr.php
+++ b/phpFlickr.php
@@ -427,7 +427,7 @@ function sync_upload ($photo, $title = null, $description = null, $tags = null,
 				}
 
 				$photo = realpath($photo);
-				$args['photo'] = '@' . $photo;
+				$args['photo'] = new CurlFile($photo, mime_content_type($photo), $photo);
 
 
 				$curl = curl_init($this->upload_endpoint);
@@ -489,7 +489,7 @@ function async_upload ($photo, $title = null, $description = null, $tags = null,
 				}
 
 				$photo = realpath($photo);
-				$args['photo'] = '@' . $photo;
+				$args['photo'] = new CurlFile($photo, mime_content_type($photo), $photo);
 
 
 				$curl = curl_init($this->upload_endpoint);
@@ -550,7 +550,7 @@ function replace ($photo, $photo_id, $async = null) {
 				}
 
 				$photo = realpath($photo);
-				$args['photo'] = '@' . $photo;
+				$args['photo'] = new CurlFile($photo, mime_content_type($photo), $photo);
 
 
 				$curl = curl_init($this->replace_endpoint);