diff --git a/lib/module.js b/lib/module.js
index 7697a4e..b67198e 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -55,9 +55,9 @@ export default function nuxtPruneHtml(
 
             for( const s of selectors ) {
 
-                const selector = ! selectorToKeep
-                    ? s
-                    : `${ s }:not(${ selectorToKeep })`
+                const selector = selectorToKeep
+                    ? `${ s }:not(${ selectorToKeep })`
+                    : s
                 ;
 
                 $(