diff --git a/.changeset/hot-crabs-reply.md b/.changeset/hot-crabs-reply.md
new file mode 100644
index 000000000..ef48174f0
--- /dev/null
+++ b/.changeset/hot-crabs-reply.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+Handle inspector autocomplete keydown event
diff --git a/packages/vite-plugin-svelte/src/ui/inspector/Inspector.svelte b/packages/vite-plugin-svelte/src/ui/inspector/Inspector.svelte
index 52c4cd0ba..41addcaf6 100644
--- a/packages/vite-plugin-svelte/src/ui/inspector/Inspector.svelte
+++ b/packages/vite-plugin-svelte/src/ui/inspector/Inspector.svelte
@@ -99,7 +99,7 @@
 	}
 
 	function keydown(event) {
-		if (event.repeat) {
+		if (event.repeat || event.key === undefined) {
 			return;
 		}