diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e59d5a..0b6d03b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,12 +65,6 @@ jobs:
         # --no-self-update is necessary because the windows environment cannot self-update rustup.exe.
         run: rustup update ${{ matrix.rust }} --no-self-update && rustup default ${{ matrix.rust }}
       - run: rustup target add ${{ matrix.target }}
-      # https://github.com/rust-lang/rust/issues/49078
-      - name: Fix windows-gnu rust-mingw
-        run : |
-          for i in crt2.o dllcrt2.o libmingwex.a libmsvcrt.a ; do
-            cp -f "/C/ProgramData/Chocolatey/lib/mingw/tools/install/mingw64/x86_64-w64-mingw32/lib/$i" "`rustc --print sysroot`/lib/rustlib/x86_64-pc-windows-gnu/lib"
-          done
       - run: cargo build --target ${{ matrix.target }} --all --all-features --all-targets
       - run: cargo test --target ${{ matrix.target }}
 
diff --git a/src/lib.rs b/src/lib.rs
index da56eef..b04d1d9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1244,6 +1244,9 @@ unsafe impl IoSafe for std::io::StderrLock<'_> {}
 unsafe impl IoSafe for std::io::StdinLock<'_> {}
 unsafe impl IoSafe for std::io::StdoutLock<'_> {}
 unsafe impl IoSafe for std::net::TcpStream {}
+unsafe impl IoSafe for std::process::ChildStdin {}
+unsafe impl IoSafe for std::process::ChildStdout {}
+unsafe impl IoSafe for std::process::ChildStderr {}
 
 #[cfg(unix)]
 unsafe impl IoSafe for std::os::unix::net::UnixStream {}