diff --git a/serde/build.rs b/serde/build.rs
index a78b6d79a..1453adf10 100644
--- a/serde/build.rs
+++ b/serde/build.rs
@@ -34,6 +34,7 @@ fn main() {
     // https://doc.rust-lang.org/std/path/struct.PathBuf.html#method.into_boxed_path
     if minor >= 20 {
         println!("cargo:rustc-cfg=de_boxed_c_str");
+        println!("cargo:rustc-cfg=de_boxed_path");
     }
 
     // From<Box<T>> for Rc<T> / Arc<T> stabilized in Rust 1.21:
diff --git a/serde/src/de/impls.rs b/serde/src/de/impls.rs
index cffe05900..efd194ccc 100644
--- a/serde/src/de/impls.rs
+++ b/serde/src/de/impls.rs
@@ -1610,7 +1610,7 @@ impl<'de> Deserialize<'de> for PathBuf {
     }
 }
 
-#[cfg(all(feature = "std", de_boxed_c_str))]
+#[cfg(all(feature = "std", de_boxed_path))]
 forwarded_impl!((), Box<Path>, PathBuf::into_boxed_path);
 
 ////////////////////////////////////////////////////////////////////////////////