1 files changed, 1 insertions, 1 deletions
diff --git a/docker/Dockerfile-optimised b/docker/Dockerfile-optimised
index cc6f37a9e1..e3af87b256 100644
--- a/docker/Dockerfile-optimised
+++ b/docker/Dockerfile-optimised
@@ -8,7 +8,7 @@
 # There is an optional PYTHON_VERSION build argument which sets the
 # version of python to build against: for example:
 #
-#    docker build -f docker/Dockerfile --build-arg PYTHON_VERSION=3.6 .
+#    docker build -f docker/Dockerfile --build-arg PYTHON_VERSION=3.6 --build-arg MARCH=skylake-avx512 .
 #
 
 ARG PYTHON_VERSION=3.7.4