diff --git a/CategoryTree.php b/CategoryTree.php
index 108c32a3..0eb8074a 100644
--- a/CategoryTree.php
+++ b/CategoryTree.php
@@ -139,10 +139,12 @@ $wgAjaxExportList[] = 'efCategoryTreeAjaxWrapper';
 /**
  * Register ResourceLoader modules
  */
-$wgResourceModules['ext.categoryTree'] = array(
+$commonModuleInfo = array(
 	'localBasePath' => dirname( __FILE__ ) . '/modules',
 	'remoteExtPath' => 'CategoryTree/modules',
-	'styles' => 'ext.categoryTree.css',
+);
+
+$wgResourceModules['ext.categoryTree'] = array(
 	'scripts' => 'ext.categoryTree.js',
 	'messages' => array(
 		'categorytree-collapse',
@@ -158,7 +160,11 @@ $wgResourceModules['ext.categoryTree'] = array(
 		'categorytree-error',
 		'categorytree-retry',
 	),
-);
+) + $commonModuleInfo;
+
+$wgResourceModules['ext.categoryTree.css'] = array(
+	'styles' => 'ext.categoryTree.css',
+) + $commonModuleInfo;
 
 /**
  * Hook it up
diff --git a/CategoryTreeFunctions.php b/CategoryTreeFunctions.php
index 0456294f..5034be88 100644
--- a/CategoryTreeFunctions.php
+++ b/CategoryTreeFunctions.php
@@ -161,7 +161,8 @@ class CategoryTree {
 	 * @param OutputPage $outputPage
 	 */
 	static function setHeaders( $outputPage ) {
-		# Add the module
+		# Add the modules
+		$outputPage->addModuleStyles( 'ext.categoryTree.css' );
 		$outputPage->addModules( 'ext.categoryTree' );
 	}