diff --git a/tutorial/tutorial_sphinx_theme_1/layout.html b/tutorial/tutorial_sphinx_theme_1/layout.html
index 2e73c85..7a13870 100644
--- a/tutorial/tutorial_sphinx_theme_1/layout.html
+++ b/tutorial/tutorial_sphinx_theme_1/layout.html
@@ -337,7 +337,7 @@
//console.log("initDropdownLinks ");
var platform_api_links = document.getElementsByClassName('dropdown-platform-api');
//let pattern = new RegExp("\/[windows|linux|android]\/[d3d11|d3d12|vulkan|opengl|opengles]\/","gm");
- let pattern = new RegExp("(windows|linux|android)\/(d3d11|d3d12|vulkan|opengl|opengles)","gm");
+ let pattern = new RegExp("(windows|linux|android)\/(d3d11|d3d12|vulkan|opengles|opengl)","gm");
let root_pattern = new RegExp("(.*)\/([a-z0-9A-Z_]+\.html)","gm");
[].forEach.call(platform_api_links, function(el) {
href=window.location.href;
diff --git a/tutorial/tutorial_sphinx_theme_1/platforms.html b/tutorial/tutorial_sphinx_theme_1/platforms.html
index 8bb8887..a78e49e 100644
--- a/tutorial/tutorial_sphinx_theme_1/platforms.html
+++ b/tutorial/tutorial_sphinx_theme_1/platforms.html
@@ -4,14 +4,14 @@
{{ platform_api }}