diff --git a/dev/http.go b/dev/http.go
index 7726719..2f8f61c 100644
--- a/dev/http.go
+++ b/dev/http.go
@@ -170,6 +170,7 @@ func (h *HTTPServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 		fi, err := os.Stat(path)
 		if err == nil && !fi.IsDir() {
 			if ofile, err := os.Open(path); err == nil {
+				defer ofile.Close()
 				http.ServeContent(w, req, req.URL.Path, fi.ModTime(), io.ReadSeeker(ofile))
 				return
 			}