diff --git a/Simulating-events-from-a-video.md b/Simulating-events-from-a-video.md
index 1d7a85d..941aceb 100644
--- a/Simulating-events-from-a-video.md
+++ b/Simulating-events-from-a-video.md
@@ -63,7 +63,7 @@ rosrun esim_ros esim_node \
  --use_log_image=1 \
  --log_eps=0.1 \
  --contrast_threshold_pos=0.15 \
- --contrast_threshold_neg=0.15 \
+ --contrast_threshold_neg=0.15
 ```
 
 If you get an error message: `Could not find ROS master`, open a new terminal, and start a `roscore` as follows: `roscore`.