diff --git a/lib/puppet-strings/yard/code_objects/type.rb b/lib/puppet-strings/yard/code_objects/type.rb
index 0d8a1fe9c..1535523d3 100644
--- a/lib/puppet-strings/yard/code_objects/type.rb
+++ b/lib/puppet-strings/yard/code_objects/type.rb
@@ -148,6 +148,7 @@ def add_check(check)
   end
 
   def parameters
+    @parameters ||= []  # guard against not filled parameters
     # just return params if there are no providers
     return @parameters if providers.empty?