diff --git a/Tools/gazebo_sitl_multiple_run.sh b/Tools/gazebo_sitl_multiple_run.sh
index 2f1b99fbe3..41cb6acd04 100755
--- a/Tools/gazebo_sitl_multiple_run.sh
+++ b/Tools/gazebo_sitl_multiple_run.sh
@@ -35,6 +35,12 @@ then
 	exit 1
 fi
 
+if [ $num_vehicles -gt 255 ]
+then
+	echo "Tried spawning $num_vehicles vehicles. The maximum number of supported vehicles is 255"
+	exit 1
+fi
+
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 src_path="$SCRIPT_DIR/.."