diff --git a/src/lib.rs b/src/lib.rs
index af0706d3..3b1a5869 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -46,7 +46,7 @@ mod android;
 
 mod events;
 
-#[cfg(not(target_os = "windows"), not(target_os = "linux"), not(target_os = "macos"), not(target_os = "android"))]
+#[cfg(all(not(target_os = "windows"), not(target_os = "linux"), not(target_os = "macos"), not(target_os = "android")))]
 compile_error!("Only the `windows`, `linux` and `macos` platforms are supported")
 
 /// Identifier for a monitor.
diff --git a/src/x11/ffi.rs b/src/x11/ffi.rs
index 8ab6f45c..1f72943c 100644
--- a/src/x11/ffi.rs
+++ b/src/x11/ffi.rs
@@ -1,6 +1,7 @@
 #![allow(dead_code)]
 #![allow(non_snake_case)]
 #![allow(non_camel_case_types)]
+#![allow(non_uppercase_statics)]
 
 use libc;