diff --git a/commands.go b/commands.go
index 4cad9f68c1..4ccdba67d6 100644
--- a/commands.go
+++ b/commands.go
@@ -927,6 +927,7 @@ func (srv *Server) CmdRun(stdin io.ReadCloser, stdout io.Writer, args ...string)
 		if !config.Detach {
 			Go(func() error {
 				_, err := io.Copy(cmdStdin, stdin)
+				cmdStdin.Close()
 				return err
 			})
 		}