diff --git a/user/shell/sbus.c b/user/shell/sbus.c
index b7a31a5..6602221 100644
--- a/user/shell/sbus.c
+++ b/user/shell/sbus.c
@@ -38,6 +38,8 @@ int sbus(int argc, char *argv[])
         shell_puts(str);
     }
 
+    close(sbus_fd);
+
     return 0;
 }