diff --git a/futures/src/lib.rs b/futures/src/lib.rs
index d1a149f7..46fc59fc 100644
--- a/futures/src/lib.rs
+++ b/futures/src/lib.rs
@@ -14,7 +14,10 @@ mod runtime;
 pub mod executor;
 pub mod subscription;
 
-#[cfg(any(feature = "tokio", feature = "async-std"))]
+#[cfg(all(
+    any(feature = "tokio", feature = "async-std"),
+    not(target_arch = "wasm32")
+))]
 #[cfg_attr(docsrs, doc(cfg(any(feature = "tokio", feature = "async-std"))))]
 pub mod time;
 
diff --git a/src/lib.rs b/src/lib.rs
index d1e5fb94..7885ee12 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -190,7 +190,10 @@ pub mod settings;
 pub mod widget;
 pub mod window;
 
-#[cfg(any(feature = "tokio", feature = "async-std"))]
+#[cfg(all(
+    any(feature = "tokio", feature = "async-std"),
+    not(target_arch = "wasm32")
+))]
 #[cfg_attr(docsrs, doc(cfg(any(feature = "tokio", feature = "async-std"))))]
 pub mod time;