diff --git a/src/lib.rs b/src/lib.rs
index d31f50b..b3831dc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -653,7 +653,7 @@
 ///
 /// If present, either of these would be an error using `from_str`.
 ///
-/// *This function is available if Syn is built with the `"parsing"` feature.*
+/// *This function is available if Syn is built with the `"parsing"` and `"full"` features.*
 ///
 /// # Examples
 ///