diff --git a/plugins/postcss-cascade-layers/src/adjust-selector-specificity.ts b/plugins/postcss-cascade-layers/src/adjust-selector-specificity.ts
index 979e9df63..1ee0bccc7 100644
--- a/plugins/postcss-cascade-layers/src/adjust-selector-specificity.ts
+++ b/plugins/postcss-cascade-layers/src/adjust-selector-specificity.ts
@@ -27,8 +27,8 @@ function generateNot(specificity: number) {
 
 	let list = '';
 	for (let i = 0; i < specificity; i++) {
-		list += ':not(#\\#)'; // something short but still very uncommon
+		list += '#\\#'; // something short but still very uncommon
 	}
 
-	return list;
+	return `:not(${list})`;
 }