diff --git a/opt/opt.rs b/opt/opt.rs
index 8f55401b..b1646da2 100644
--- a/opt/opt.rs
+++ b/opt/opt.rs
@@ -3,7 +3,7 @@
 #![deny(missing_debug_implementations)]
 #![cfg_attr(
     feature = "wasm",
-    feature(use_extern_macros, wasm_custom_section, wasm_import_module)
+    feature(use_extern_macros)
 )]
 
 #[macro_use]
diff --git a/wasm-api/wasm-api.rs b/wasm-api/wasm-api.rs
index 3c7c4d60..0e501dac 100755
--- a/wasm-api/wasm-api.rs
+++ b/wasm-api/wasm-api.rs
@@ -1,6 +1,6 @@
 #![cfg(target_arch = "wasm32")]
 #![cfg(feature = "emit_json")]
-#![feature(use_extern_macros, wasm_custom_section, wasm_import_module)]
+#![feature(use_extern_macros)]
 
 extern crate wasm_bindgen;