diff --git a/futures/tests/no-std/build.rs b/futures/tests/no-std/build.rs
index a96a68274..ffe079066 100644
--- a/futures/tests/no-std/build.rs
+++ b/futures/tests/no-std/build.rs
@@ -2,6 +2,7 @@ use std::{env, process::Command};
 
 fn main() {
     if is_nightly() {
+        println!("cargo::rustc-check-cfg=cfg(nightly)");
         println!("cargo:rustc-cfg=nightly");
     }
 }