diff --git a/targets/mbedos5/.gitignore b/targets/mbedos5/.gitignore
index 795c32866..1aaa6a584 100644
--- a/targets/mbedos5/.gitignore
+++ b/targets/mbedos5/.gitignore
@@ -2,6 +2,7 @@ mbed-os
 mbed-events
 .build
 .mbed
+.temp/
 mbed_settings.py
 js/pins.js
 source/pins.cpp
diff --git a/targets/mbedos5/Makefile b/targets/mbedos5/Makefile
index a0b4d3d52..30eff3842 100644
--- a/targets/mbedos5/Makefile
+++ b/targets/mbedos5/Makefile
@@ -80,6 +80,7 @@ endif
 getlibs: .mbed
 
 .mbed:
+	echo 'ROOT=.' > .mbed
 	mbed config root .
 	mbed toolchain GCC_ARM
 	mbed target $(BOARD)