Support feature(extern_in_paths)
diff --git a/src/path.rs b/src/path.rs
index 19c1f05..e57c8f4 100644
--- a/src/path.rs
+++ b/src/path.rs
@@ -368,6 +368,8 @@
         keyword!(Self) => { Into::into }
         |
         keyword!(crate) => { Into::into }
+        |
+        keyword!(extern) => { Into::into }
     ));
 
     named!(pub qpath -> (Option<QSelf>, Path), alt!(