diff --git a/examples/using-preact/server.js b/examples/using-preact/server.js
index 7ecf74fd0f93..1649c81a7a76 100644
--- a/examples/using-preact/server.js
+++ b/examples/using-preact/server.js
@@ -3,7 +3,7 @@ const moduleAlias = require('module-alias')
 
 // For the development version, we'll use React.
 // Because, it support react hot loading and so on.
-if (dev) {
+if (!dev) {
   moduleAlias.addAlias('react', 'preact-compat')
   moduleAlias.addAlias('react-dom', 'preact-compat')
 }