diff --git a/lib/paginator/ecto/order_by.ex b/lib/paginator/ecto/order_by.ex
index 37ea1bd..ddeaaab 100644
--- a/lib/paginator/ecto/order_by.ex
+++ b/lib/paginator/ecto/order_by.ex
@@ -25,7 +25,7 @@ defmodule Paginator.Ecto.OrderBy do
           {field, key}
 
         _ ->
-          raise "Unsupported `order_by` syntax, could not infer the cursor fields. Please supply `cursor_fields` manually."
+          raise "Unsupported `order_by` syntax, could not infer cursor fields for Paginator. Please supply `cursor_fields` manually."
       end
     end)
   end
diff --git a/test/paginator/order_by_test.exs b/test/paginator/order_by_test.exs
index 1adbcd7..cdf7e9d 100644
--- a/test/paginator/order_by_test.exs
+++ b/test/paginator/order_by_test.exs
@@ -36,7 +36,7 @@ defmodule Paginator.OrderByTest do
 
     test "rejects order_by with a fragment" do
       assert_raise RuntimeError,
-                   "Unsupported `order_by` syntax, could not infer the cursor fields. Please supply `cursor_fields` manually.",
+                   "Unsupported `order_by` syntax, could not infer cursor fields for Paginator. Please supply `cursor_fields` manually.",
                    fn ->
                      from(p in "payments",
                        order_by: fragment("amount")