diff --git a/openresty-build-tools/kong-ngx-build b/openresty-build-tools/kong-ngx-build
index 05210f9a..81aff3db 100755
--- a/openresty-build-tools/kong-ngx-build
+++ b/openresty-build-tools/kong-ngx-build
@@ -1039,8 +1039,11 @@ show_usage() {
   echo "      --resty-lmdb <branch>          Specify a lua-resty-lmdb branch to use when patching and compiling."
   echo "                                     (Defaults to \"master\")"
   echo ""
-  echo "      --resty-websocket <tag>        Specify a Kong/lua-resty-websocket tag to install in place of the"
-  echo "                                     bundled version of lua-resty-websocket (Defaults to \"$RESTY_WEBSOCKET\")"
+  echo "      --resty-websocket <tag>        Specify a Kong/lua-resty-websocket tag to install. If absent, lua-resty-websocket"
+  echo "                                     will not be built."
+  echo ""
+  echo "      --atc-router <tag>             Specify a Kong/atc-router tag to install. If absent, atc-router"
+  echo "                                     will not be built."
   echo ""
   echo "      --luarocks <luarocks_ver>      Version of LuaRocks to build, such as 3.1.2. If absent, LuaRocks"
   echo "                                     will not be built."