diff --git a/ext/io/Cargo.toml b/ext/io/Cargo.toml
index 7b9d196926..7570c7aa25 100644
--- a/ext/io/Cargo.toml
+++ b/ext/io/Cargo.toml
@@ -22,4 +22,4 @@ tokio.workspace = true
 nix.workspace = true
 
 [target.'cfg(windows)'.dependencies]
-winapi = { workspace = true, features = ["winbase"] }
+winapi = { workspace = true, features = ["winbase", "processenv"] }