diff --git a/app/models/cms/portlet.rb b/app/models/cms/portlet.rb
index 03057599c..4d378681c 100644
--- a/app/models/cms/portlet.rb
+++ b/app/models/cms/portlet.rb
@@ -78,7 +78,7 @@ def self.has_edit_link?
     # @return [Array<Class>]
     def self.types
       @types ||= ActiveSupport::Dependencies.autoload_paths.map do |d|
-        if d =~ /app\/portlets/
+        if d.to_s =~ /app\/portlets/
           Dir["#{d}/*_portlet.rb"].map do |p|
             File.basename(p, ".rb").classify.constantize
           end