diff --git a/Tools/sitl_run.sh b/Tools/sitl_run.sh
index 6e2cbc19be..3c65aa4eec 100755
--- a/Tools/sitl_run.sh
+++ b/Tools/sitl_run.sh
@@ -2,4 +2,4 @@
 
 mkdir -p Build/posix_sitl.build/rootfs/fs/microsd
 mkdir -p Build/posix_sitl.build/rootfs/eeprom
-cd Build/posix_sitl.build && ./mainapp ../$1
+cd Build/posix_sitl.build && ./mainapp ../../$1