diff --git a/.changeset/yellow-yaks-promise.md b/.changeset/yellow-yaks-promise.md
new file mode 100644
index 000000000000..2b9aa21ff90c
--- /dev/null
+++ b/.changeset/yellow-yaks-promise.md
@@ -0,0 +1,5 @@
+---
+"@astrojs/vercel": patch
+---
+
+Fixes an issue where a build could not complete on Node 21.
diff --git a/packages/integrations/vercel/src/serverless/adapter.ts b/packages/integrations/vercel/src/serverless/adapter.ts
index efefe2df89d5..185ae5d92bc6 100644
--- a/packages/integrations/vercel/src/serverless/adapter.ts
+++ b/packages/integrations/vercel/src/serverless/adapter.ts
@@ -377,13 +377,6 @@ function validateRuntime() {
 	const version = process.version.slice(1); // 'v16.5.0' --> '16.5.0'
 	const major = version.split('.')[0]; // '16.5.0' --> '16'
 	const support = SUPPORTED_NODE_VERSIONS[major];
-	if (support.status === 'beta') {
-		console.warn(
-			`[${PACKAGE_NAME}] The local Node.js version (${major}) is currently in beta for Vercel Serverless Functions.`
-		);
-		console.warn(`[${PACKAGE_NAME}] Make sure to update your Vercel settings to use ${major}.`);
-		return;
-	}
 	if (support === undefined) {
 		console.warn(
 			`[${PACKAGE_NAME}] The local Node.js version (${major}) is not supported by Vercel Serverless Functions.`
@@ -392,6 +385,13 @@ function validateRuntime() {
 		console.warn(`[${PACKAGE_NAME}] Consider switching your local version to 18.`);
 		return;
 	}
+	if (support.status === 'beta') {
+		console.warn(
+			`[${PACKAGE_NAME}] The local Node.js version (${major}) is currently in beta for Vercel Serverless Functions.`
+		);
+		console.warn(`[${PACKAGE_NAME}] Make sure to update your Vercel settings to use ${major}.`);
+		return;
+	}
 	if (support.status === 'deprecated') {
 		console.warn(
 			`[${PACKAGE_NAME}] Your project is being built for Node.js ${major} as the runtime.`