diff --git a/src/internal/Component.js b/src/internal/Component.js
index e4be6aed6e..871dbd6054 100644
--- a/src/internal/Component.js
+++ b/src/internal/Component.js
@@ -48,7 +48,7 @@ function make_dirty(component, key) {
 	if (!component.$$.dirty) {
 		dirty_components.push(component);
 		schedule_update();
-		component.$$.dirty = Object.create(null);
+		component.$$.dirty = blank_object();
 	}
 	component.$$.dirty[key] = true;
 }