diff --git a/src/path.rs b/src/path.rs
index 10a043e..d435228 100644
--- a/src/path.rs
+++ b/src/path.rs
@@ -427,6 +427,9 @@
         /// - the first path segment has no angle bracketed or parenthesized
         ///   path arguments
         /// - and the ident of the first path segment is equal to the given one.
+        ///
+        /// *This function is available if Syn is built with the `"parsing"`
+        /// feature.*
         pub fn is_ident<I>(&self, ident: I) -> bool
         where
             Ident: PartialEq<I>,