diff --git a/.gitignore b/.gitignore
index e12db157..677eafc3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 target/
 **/Cargo.lock
 */.cargo/config
-.vscode/
\ No newline at end of file
+.vscode/
+.DS_Store
\ No newline at end of file
diff --git a/chacha20/src/rng.rs b/chacha20/src/rng.rs
index d3894d70..8178a0c2 100644
--- a/chacha20/src/rng.rs
+++ b/chacha20/src/rng.rs
@@ -179,11 +179,9 @@ impl_zeroize_to_le_bytes!(u128, 16, Zeroizing16Bytes);
 /// * `[u8; 5]`
 ///
 /// There would be a minor performance benefit from using a `[u8; 5]`, as it
-/// avoids some copies, bit operations, and extra zeroizing.
+/// avoids some copies and bit operations.
 pub struct WordPosInput([u8; 5]);
 
-impl_zeroize_from!([u8; 5], WordPosInput);
-
 impl From<u64> for WordPosInput {
     #[cfg(feature = "zeroize")]
     fn from(mut value: u64) -> Self {