diff --git a/upload.go b/upload.go
index bca37e6..719eb2c 100644
--- a/upload.go
+++ b/upload.go
@@ -229,7 +229,7 @@ func uploadRemote(c web.C, w http.ResponseWriter, r *http.Request) {
 
 func uploadHeaderProcess(r *http.Request, upReq *UploadRequest) {
 	if len(r.Header.Get("Content-Length")) > 0 {
-		if r.Header.Get("Content-Length") > Config.maxSize {
+		if (strconf.Atoi(r.Header.Get("Content-Length")) > Config.maxSize {
 			upReq.size = r.Header.Get("Content-Length")
 		}
 	}