diff --git a/juniper/src/value/mod.rs b/juniper/src/value/mod.rs
index 3a61ccc7..eafd1523 100644
--- a/juniper/src/value/mod.rs
+++ b/juniper/src/value/mod.rs
@@ -250,6 +250,8 @@ where
 ///
 /// # fn main() {
 /// # let _: V =
+/// graphql_value!(None);
+/// # let _: V =
 /// graphql_value!(1234);
 /// # let _: V =
 /// graphql_value!("test");