diff --git a/board/src/square.rs b/board/src/square.rs
index 586abd3..7a0d6d8 100644
--- a/board/src/square.rs
+++ b/board/src/square.rs
@@ -51,6 +51,7 @@ macro_rules! coordinate_enum {
                     const $variant: usize = $name::$variant as usize;
                 )*
 
+                #[allow(non_upper_case_globals)]
                 match index {
                     $($variant => Some($name::$variant),)*
                     _ => None,