diff --git a/glutin-winit/build.rs b/glutin-winit/build.rs
index 32078de541..c64860b7c5 100644
--- a/glutin-winit/build.rs
+++ b/glutin-winit/build.rs
@@ -23,4 +23,19 @@ fn main() {
         wgl_backend: { all(feature = "wgl", windows, not(wasm_platform)) },
         cgl_backend: { all(macos_platform, not(wasm_platform)) },
     }
+
+    println!("cargo:rustc-check-cfg=cfg(android_platform)");
+    println!("cargo:rustc-check-cfg=cfg(wasm_platform)");
+    println!("cargo:rustc-check-cfg=cfg(macos_platform)");
+    println!("cargo:rustc-check-cfg=cfg(ios_platform)");
+    println!("cargo:rustc-check-cfg=cfg(apple)");
+    println!("cargo:rustc-check-cfg=cfg(free_unix)");
+
+    println!("cargo:rustc-check-cfg=cfg(x11_platform)");
+    println!("cargo:rustc-check-cfg=cfg(wayland_platform)");
+
+    println!("cargo:rustc-check-cfg=cfg(egl_backend)");
+    println!("cargo:rustc-check-cfg=cfg(glx_backend)");
+    println!("cargo:rustc-check-cfg=cfg(wgl_backend)");
+    println!("cargo:rustc-check-cfg=cfg(cgl_backend)");
 }
diff --git a/glutin/build.rs b/glutin/build.rs
index c8eab1b931..ceaa1e0a84 100644
--- a/glutin/build.rs
+++ b/glutin/build.rs
@@ -21,4 +21,19 @@ fn main() {
         wgl_backend: { all(feature = "wgl", windows, not(wasm_platform)) },
         cgl_backend: { all(macos_platform, not(wasm_platform)) },
     }
+
+    println!("cargo:rustc-check-cfg=cfg(android_platform)");
+    println!("cargo:rustc-check-cfg=cfg(wasm_platform)");
+    println!("cargo:rustc-check-cfg=cfg(macos_platform)");
+    println!("cargo:rustc-check-cfg=cfg(ios_platform)");
+    println!("cargo:rustc-check-cfg=cfg(apple)");
+    println!("cargo:rustc-check-cfg=cfg(free_unix)");
+
+    println!("cargo:rustc-check-cfg=cfg(x11_platform)");
+    println!("cargo:rustc-check-cfg=cfg(wayland_platform)");
+
+    println!("cargo:rustc-check-cfg=cfg(egl_backend)");
+    println!("cargo:rustc-check-cfg=cfg(glx_backend)");
+    println!("cargo:rustc-check-cfg=cfg(wgl_backend)");
+    println!("cargo:rustc-check-cfg=cfg(cgl_backend)");
 }
diff --git a/glutin_examples/build.rs b/glutin_examples/build.rs
index 2fbd6cc476..c109f8ee73 100644
--- a/glutin_examples/build.rs
+++ b/glutin_examples/build.rs
@@ -29,6 +29,21 @@ fn main() {
         cgl_backend: { all(macos_platform, not(wasm_platform)) },
     }
 
+    println!("cargo:rustc-check-cfg=cfg(android_platform)");
+    println!("cargo:rustc-check-cfg=cfg(wasm_platform)");
+    println!("cargo:rustc-check-cfg=cfg(macos_platform)");
+    println!("cargo:rustc-check-cfg=cfg(ios_platform)");
+    println!("cargo:rustc-check-cfg=cfg(apple)");
+    println!("cargo:rustc-check-cfg=cfg(free_unix)");
+
+    println!("cargo:rustc-check-cfg=cfg(x11_platform)");
+    println!("cargo:rustc-check-cfg=cfg(wayland_platform)");
+
+    println!("cargo:rustc-check-cfg=cfg(egl_backend)");
+    println!("cargo:rustc-check-cfg=cfg(glx_backend)");
+    println!("cargo:rustc-check-cfg=cfg(wgl_backend)");
+    println!("cargo:rustc-check-cfg=cfg(cgl_backend)");
+
     let dest = PathBuf::from(&env::var("OUT_DIR").unwrap());
 
     println!("cargo:rerun-if-changed=build.rs");