diff --git a/index.js b/index.js
index <HASH>..<HASH> 100644
--- a/index.js
+++ b/index.js
@@ -8,6 +8,11 @@ module.exports = {
     var app = appOrAddon.app || appOrAddon;
     if (!app.__emberPowerSelectIncludedInvoked) {
       app.__emberPowerSelectIncludedInvoked = true;
+
+      // Since ember-power-select styles already `@import` styles of ember-basic-dropdown,
+      // this flag tells to ember-basic-dropdown to skip importing its styles.
+      app.__skipEmberBasicDropdownStyles = true;
+
       this._super.included.apply(this, arguments);
       // Don't include the precompiled css file if the user uses ember-cli-sass
       if (!app.registry.availablePlugins['ember-cli-sass']) {
Enable flag in first invocation to ensure ember-basic-dropdown doesn't include its styles