diff --git a/docs/reference/commandline/stop.md b/docs/reference/commandline/stop.md
index e4c567fb78..282a378582 100644
--- a/docs/reference/commandline/stop.md
+++ b/docs/reference/commandline/stop.md
@@ -19,7 +19,9 @@ Options:
 ## Description
 
 The main process inside the container will receive `SIGTERM`, and after a grace
-period, `SIGKILL`.
+period, `SIGKILL`. The first signal can be changed with the `STOPSIGNAL`
+instruction in the container's Dockerfile, or the `--stop-signal` option to
+`docker run`.
 
 ## Examples