Add non_exhaustive
diff --git a/src/lib.rs b/src/lib.rs
index d897248..f7b7dd9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2154,6 +2154,7 @@
 
 /// Error type for rust-bindgen.
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum BindgenError {
     /// Any provided header was invalid.
     InvalidHeader(String),