diff --git a/futures-util/Cargo.toml b/futures-util/Cargo.toml
index 617fcff471..578d50b9d5 100644
--- a/futures-util/Cargo.toml
+++ b/futures-util/Cargo.toml
@@ -30,6 +30,10 @@ channel = ["std", "futures-channel-preview"]
 join-macro = ["async-await", "futures-join-macro-preview", "proc-macro-hack", "proc-macro-nested"]
 select-macro = ["async-await", "futures-select-macro-preview", "proc-macro-hack", "proc-macro-nested", "rand"]
 
+# re-export optional WASM dependencies to avoid breakage in getrandom:
+wasm-bindgen = ["rand/wasm-bindgen"]
+stdweb = ["rand/stdweb"]
+
 [dependencies]
 futures-core-preview = { path = "../futures-core", version = "=0.3.0-alpha.18", default-features = false }
 futures-channel-preview = { path = "../futures-channel", version = "=0.3.0-alpha.18", default-features = false, features = ["std"], optional = true }
diff --git a/futures/Cargo.toml b/futures/Cargo.toml
index 14fe4fdf1e..d38499c861 100644
--- a/futures/Cargo.toml
+++ b/futures/Cargo.toml
@@ -45,5 +45,9 @@ compat = ["std", "futures-util-preview/compat"]
 io-compat = ["compat", "futures-util-preview/io-compat"]
 cfg-target-has-atomic = ["futures-core-preview/cfg-target-has-atomic", "futures-channel-preview/cfg-target-has-atomic", "futures-util-preview/cfg-target-has-atomic"]
 
+# re-export optional WASM dependencies to avoid breakage in rand:
+wasm-bindgen = ["futures-util-preview/wasm-bindgen"]
+stdweb = ["futures-util-preview/stdweb"]
+
 [package.metadata.docs.rs]
 all-features = true