diff --git a/.changeset/spotty-kings-pull.md b/.changeset/spotty-kings-pull.md
new file mode 100644
index 000000000000..039e4ee3424c
--- /dev/null
+++ b/.changeset/spotty-kings-pull.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: treat client/universal hooks as entrypoints for illegal server import detection
diff --git a/packages/kit/src/exports/vite/index.js b/packages/kit/src/exports/vite/index.js
index 7d6cf2a9589f..68adabdd8661 100644
--- a/packages/kit/src/exports/vite/index.js
+++ b/packages/kit/src/exports/vite/index.js
@@ -598,6 +598,9 @@ async function kit({ svelte_config }) {
 					if (node.universal) entrypoints.add(node.universal);
 				}
 
+				if (manifest_data.hooks.client) entrypoints.add(manifest_data.hooks.client);
+				if (manifest_data.hooks.universal) entrypoints.add(manifest_data.hooks.universal);
+
 				const normalized = normalize_id(id, normalized_lib, normalized_cwd);
 				const chain = [normalized];