diff --git a/library/Icinga/Web/JavaScript.php b/library/Icinga/Web/JavaScript.php
index 91292fc41..262d462b4 100644
--- a/library/Icinga/Web/JavaScript.php
+++ b/library/Icinga/Web/JavaScript.php
@@ -35,7 +35,8 @@ class JavaScript
         'js/icinga/behavior/flyover.js',
         'js/icinga/behavior/expandable.js',
         'js/icinga/behavior/filtereditor.js',
-        'js/icinga/behavior/selectable.js'
+        'js/icinga/behavior/selectable.js',
+        'js/icinga/behavior/modal.js'
     );
 
     protected static $vendorFiles = array(
diff --git a/library/Icinga/Web/StyleSheet.php b/library/Icinga/Web/StyleSheet.php
index 6ef874162..86e43b192 100644
--- a/library/Icinga/Web/StyleSheet.php
+++ b/library/Icinga/Web/StyleSheet.php
@@ -51,7 +51,8 @@ class StyleSheet
         'css/icinga/spinner.less',
         'css/icinga/compat.less',
         'css/icinga/print.less',
-        'css/icinga/responsive.less'
+        'css/icinga/responsive.less',
+        'css/icinga/modal.less'
     );
 
     /**