diff --git a/Tools/jMAVSim b/Tools/jMAVSim
index dc10a13c78..883413f8b9 160000
--- a/Tools/jMAVSim
+++ b/Tools/jMAVSim
@@ -1 +1 @@
-Subproject commit dc10a13c78afeb97f7b570f8049ec8a912e22d81
+Subproject commit 883413f8b97cc53d48491d6ff3630d6efd2e2467
diff --git a/Tools/jmavsim_run.sh b/Tools/jmavsim_run.sh
index 18c92485c1..a974edee27 100755
--- a/Tools/jmavsim_run.sh
+++ b/Tools/jmavsim_run.sh
@@ -33,9 +33,6 @@ while getopts ":b:d:p:qsr:f:i:l" opt; do
 		r)
 			extra_args="$extra_args -r $OPTARG"
 			;;
-		f)
-			extra_args="$extra_args -f $OPTARG"
-			;;
 		l)
 			extra_args="$extra_args -lockstep"
 			;;
diff --git a/Tools/sitl_run.sh b/Tools/sitl_run.sh
index de806fc332..985bd6250f 100755
--- a/Tools/sitl_run.sh
+++ b/Tools/sitl_run.sh
@@ -63,16 +63,9 @@ done
 
 SIM_PID=0
 
-# Allow speed factor to bet set from environment.
-if [[ -n "$PX4_SIM_SPEED_FACTOR" ]]; then
-	speed_factor=$PX4_SIM_SPEED_FACTOR
-else
-	speed_factor=1
-fi
-
 if [ "$program" == "jmavsim" ] && [ ! -n "$no_sim" ]; then
 	# Start Java simulator
-	"$src_path"/Tools/jmavsim_run.sh -r 250 -f $speed_factor -l &
+	"$src_path"/Tools/jmavsim_run.sh -r 250 -l &
 	SIM_PID=`echo $!`
 elif [ "$program" == "gazebo" ] && [ ! -n "$no_sim" ]; then
 	if [ -x "$(command -v gazebo)" ]; then