diff --git a/src/compiler/compile/css/Selector.ts b/src/compiler/compile/css/Selector.ts
index 39bbc2e8d1..e5fe535740 100644
--- a/src/compiler/compile/css/Selector.ts
+++ b/src/compiler/compile/css/Selector.ts
@@ -32,7 +32,7 @@ export default class Selector {
 		}
 
 		this.local_blocks = this.blocks.slice(0, i);
-		this.used = this.blocks[0].global;
+		this.used = this.blocks.every(block => block.global);
 	}
 
 	apply(node: Element, stack: Element[]) {