diff --git a/packages/svelte/src/internal/client/reactivity/props.js b/packages/svelte/src/internal/client/reactivity/props.js
index 0a5e7467302c..b7200f6f967f 100644
--- a/packages/svelte/src/internal/client/reactivity/props.js
+++ b/packages/svelte/src/internal/client/reactivity/props.js
@@ -346,7 +346,7 @@ export function prop(props, key, flags, fallback) {
 		}
 
 		if (arguments.length > 0) {
-			const new_value = mutation ? get(current_value) : bindable ? proxy(value) : value;
+			const new_value = mutation ? get(current_value) : runes && bindable ? proxy(value) : value;
 
 			if (!current_value.equals(new_value)) {
 				from_child = true;