diff --git a/docusaurus.config.ts b/docusaurus.config.ts
index 1af62d2c..2b1c1dc8 100644
--- a/docusaurus.config.ts
+++ b/docusaurus.config.ts
@@ -50,6 +50,7 @@ const config: Config = {
 	markdown: {
 		mermaid: true,
 	},
+	clientModules: ["./src/clientModules/ensure-gtag.js"],
 	themes: ["@docusaurus/theme-mermaid"],
 
 	presets: [
diff --git a/src/clientModules/ensure-gtag.js b/src/clientModules/ensure-gtag.js
new file mode 100644
index 00000000..8a34feac
--- /dev/null
+++ b/src/clientModules/ensure-gtag.js
@@ -0,0 +1,7 @@
+if (
+	process.env.NODE_ENV !== "production" &&
+	typeof window !== "undefined" &&
+	typeof window.gtag !== "function"
+) {
+	window.gtag = () => {};
+}