diff --git a/posix-configs/SITL/README.md b/posix-configs/SITL/README.md
index 8a036eea90..1bd38c0603 100644
--- a/posix-configs/SITL/README.md
+++ b/posix-configs/SITL/README.md
@@ -18,6 +18,13 @@ Steps
 
 1. Connect the RC Controller (PIXHAWK) to the PX4 machine using USB.  Verify the `/dev/ttyACM0` device appears.  Make sure that the persmissions of this device allow the PX4 app to open the device for read/write (`sudo chmod 777 /dev/ttyACM0`).
 
+1. Create the following diretories in "`./Firmware/Build/posix_sitl.build/`":
+```
+> cd ./Firmware/Build/posix_sitl.build
+> mkdir -p rootfs/fs/microsd
+> mkdir -p rootfs/eeprom
+```
+
 1. Launch PX4 from the SITL build directory "`./Firmware/Build/posix_sitl.build/`" using the command below.  The optional `<startup_file>` can be used to cause a set of commands to be entered into the PX4 shell at startup.  
 ```
 > ./mainapp <startup_file> 
diff --git a/posix-configs/SITL/init/rcS b/posix-configs/SITL/init/rcS
index cc4c76526f..8a6203a0bc 100644
--- a/posix-configs/SITL/init/rcS
+++ b/posix-configs/SITL/init/rcS
@@ -26,7 +26,7 @@ param set RC1_MAX 2015
 param set RC1_MIN 996
 param set RC1_TRIM 1502
 param set RC1_REV -1
-param set RC2_MAX 2016 
+param set RC2_MAX 2016
 param set RC2_MIN 995
 param set RC2_TRIM 1500
 param set RC3_MAX 2003