diff --git a/lib/json_api_client/resource.rb b/lib/json_api_client/resource.rb
index b0b0110..356595c 100644
--- a/lib/json_api_client/resource.rb
+++ b/lib/json_api_client/resource.rb
@@ -321,7 +321,7 @@ def _set_prefix_path(attrs)
           a.set_prefix_path(attrs, route_formatter)
         end
 
-        paths.join("/")
+        paths.compact.join("/")
       end
 
       def _new_scope