diff --git a/.changeset/tasty-planes-knock.md b/.changeset/tasty-planes-knock.md
new file mode 100644
index 000000000000..3a7a3602e461
--- /dev/null
+++ b/.changeset/tasty-planes-knock.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Preserve `--root` CLI flag when restarting dev server
diff --git a/packages/astro/src/core/dev/dev.ts b/packages/astro/src/core/dev/dev.ts
index 4fcac87fafd1..378a7157ef19 100644
--- a/packages/astro/src/core/dev/dev.ts
+++ b/packages/astro/src/core/dev/dev.ts
@@ -44,6 +44,7 @@ export default async function dev(
 		beforeRestart: () => console.clear(),
 		params: {
 			settings,
+			root: options.flags?.root,
 			logging: options.logging,
 			isRestart: options.isRestart,
 		},