diff --git a/.gitignore b/.gitignore
index 830a220..69d2112 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,4 +40,5 @@ outdir
 
 .built-in.o.cmd
 .main.o.cmd
-.browse.VC.db*
\ No newline at end of file
+.browse.VC.db*
+mbed-os/