diff --git a/crates/web-sys/build.rs b/crates/web-sys/build.rs
index 82b4138fe86..2bac1ecc70c 100644
--- a/crates/web-sys/build.rs
+++ b/crates/web-sys/build.rs
@@ -108,6 +108,7 @@ fn try_main() -> Result<(), failure::Error> {
     let out_dir = env::var("OUT_DIR").context("reading OUT_DIR environment variable")?;
     let out_file_path = path::Path::new(&out_dir).join("bindings.rs");
     fs::write(&out_file_path, bindings).context("writing bindings to output file")?;
+    println!("cargo:rustc-env=BINDINGS={}", out_file_path.display());
 
     // run rustfmt on the generated file - really handy for debugging
     println!("cargo:rerun-if-env-changed=WEBIDL_RUSTFMT_BINDINGS");
diff --git a/crates/web-sys/src/lib.rs b/crates/web-sys/src/lib.rs
index c09c36e3978..218673eef3d 100755
--- a/crates/web-sys/src/lib.rs
+++ b/crates/web-sys/src/lib.rs
@@ -27,4 +27,4 @@ pub fn window() -> Option<Window> {
     js_sys::global().dyn_into::<Window>().ok()
 }
 
-include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+include!(env!("BINDINGS"));