diff --git a/libc-test/build.rs b/libc-test/build.rs
index 639d235dc51262b7f984ddf22abdfc6f75306154..3ded0dbef8828fd2457bec54ddc006f39e276f3d 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -173,8 +173,6 @@ fn main() {
             cfg.header("crt_externs.h");
         }
         cfg.header("net/route.h");
-        cfg.header("net/route.h");
-        cfg.header("net/if_dl.h");
         cfg.header("sys/proc_info.h");
     }