diff --git a/src/Sculpin/Bundle/ContentTypesBundle/DependencyInjection/SculpinContentTypesExtension.php b/src/Sculpin/Bundle/ContentTypesBundle/DependencyInjection/SculpinContentTypesExtension.php
index <HASH>..<HASH> 100644
--- a/src/Sculpin/Bundle/ContentTypesBundle/DependencyInjection/SculpinContentTypesExtension.php
+++ b/src/Sculpin/Bundle/ContentTypesBundle/DependencyInjection/SculpinContentTypesExtension.php
@@ -72,8 +72,8 @@ class SculpinContentTypesExtension extends Extension
             $orFilters = array();
 
             if (in_array('path', $detectionTypes)) {
-                if (! isset($setup['path'])) {
-                    throw new InvalidArgumentException("Configuration for content type '$type' invalid; expected path key to be configured.");
+                if (0 == count($setup['path'])) {
+                    $setup['path'] = array('_'.$type);
                 }
 
                 //
Default to including _$type as the path if path detection is used but path is not listed ... not sure if this makes a lot of sense.