diff --git a/doc/api/resources/orders.rst b/doc/api/resources/orders.rst
index 6863fb0007..b678cfac9b 100644
--- a/doc/api/resources/orders.rst
+++ b/doc/api/resources/orders.rst
@@ -1,4 +1,4 @@
-.. spelling:: checkins
+.. spelling:: checkins, pdf
 
 
 .. _rest-orders: