diff --git a/Tools/sitl_run.sh b/Tools/sitl_run.sh
index 58ed4f6dd5..637982fd33 100755
--- a/Tools/sitl_run.sh
+++ b/Tools/sitl_run.sh
@@ -4,4 +4,12 @@ cd build_posix_sitl_simple/src/firmware/posix
 mkdir -p rootfs/fs/microsd
 mkdir -p rootfs/eeprom
 touch rootfs/eeprom/parameters
-./mainapp ../../../../$1
+if [ "$2" == "lldb" ]
+then
+	lldb -- mainapp ../../../../$1
+elif [ "$2" == "gdb" ]
+then
+	gdb -- mainapp ../../../../$1
+else
+	./mainapp ../../../../$1
+fi