diff --git a/.changeset/tricky-coats-shop.md b/.changeset/tricky-coats-shop.md
new file mode 100644
index 0000000000..b3d45933a3
--- /dev/null
+++ b/.changeset/tricky-coats-shop.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: skip unnecessary `$$legacy` flag
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js
index 44f943ddec..7c43f68a66 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/component.js
@@ -298,7 +298,10 @@ export function build_component(node, component_name, context, anchor = context.
 		push_prop(b.init('$$slots', b.object(serialized_slots)));
 	}
 
-	if (!context.state.analysis.runes) {
+	if (
+		!context.state.analysis.runes &&
+		node.attributes.some((attribute) => attribute.type === 'BindDirective')
+	) {
 		push_prop(b.init('$$legacy', b.true));
 	}
 
diff --git a/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js b/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js
index 2863caba49..062e52f8cf 100644
--- a/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js
+++ b/packages/svelte/tests/snapshot/samples/purity/_expected/client/index.svelte.js
@@ -23,10 +23,6 @@ export default function Purity($$anchor) {
 
 	var node = $.sibling($.sibling(p_1, true));
 
-	Child(node, {
-		prop: encodeURIComponent(value),
-		$$legacy: true
-	});
-
+	Child(node, { prop: encodeURIComponent(value) });
 	$.append($$anchor, fragment);
 }
\ No newline at end of file