diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index 98adc99b59..2aef1c7f28 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -151,7 +151,7 @@ export function get_root_for_style(node: Node): ShadowRoot | Document {
 	if ((root as ShadowRoot).host) {
 		return root as ShadowRoot;
 	}
-	return document;
+	return node.ownerDocument;
 }
 
 export function append_empty_stylesheet(node: Node) {