diff --git a/lib/pry-doc/pry_ext/method_info.rb b/lib/pry-doc/pry_ext/method_info.rb
index 22f5d586..72817692 100644
--- a/lib/pry-doc/pry_ext/method_info.rb
+++ b/lib/pry-doc/pry_ext/method_info.rb
@@ -115,7 +115,7 @@ def find_gem_dir(meth)
           host_source_location, _ =  WrappedModule.new(host).source_location
           break if host_source_location != nil
           return unless host.name
-          host = eval(host.namespace_name)
+          host = eval(namespace_name(host))
         end while host
 
         # We want to exclude all source_locations that aren't gems (i.e
@@ -186,6 +186,12 @@ def cache(meth)
           YARD.parse(file)
         end
       end
+
+      private
+
+      def namespace_name(host)
+        host.name.split("::")[0..-2].join("::")
+      end
     end
   end
 end