diff --git a/Cargo.toml b/Cargo.toml
index b9357bce..cea1309a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -49,8 +49,6 @@ custom = []
 rustc-dep-of-std = [
   "compiler_builtins",
   "core",
-  "libc/rustc-dep-of-std",
-  "wasi/rustc-dep-of-std",
 ]
 # Unstable/test-only feature to run wasm-bindgen tests in a browser
 test-in-browser = []