diff --git a/src/lib.rs b/src/lib.rs
index 5c87e90..02b6c7d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -47,6 +47,8 @@ mod macros;
 pub mod int;
 pub mod float;
 
+#[cfg(any(all(target_arch = "wasm32", target_os = "unknown"),
+          all(target_arch = "arm", target_os = "none")))]
 pub mod math;
 pub mod mem;