diff --git a/crypto/dalek-ff-group/src/lib.rs b/crypto/dalek-ff-group/src/lib.rs
index 6dbf7fba..c2d795bd 100644
--- a/crypto/dalek-ff-group/src/lib.rs
+++ b/crypto/dalek-ff-group/src/lib.rs
@@ -185,7 +185,9 @@ impl Scalar {
   pub fn from_hash<D: Digest<OutputSize = U64>>(hash: D) -> Scalar {
     let mut output = [0u8; 64];
     output.copy_from_slice(&hash.finalize());
-    Scalar(DScalar::from_bytes_mod_order_wide(&output))
+    let res = Scalar(DScalar::from_bytes_mod_order_wide(&output));
+    output.zeroize();
+    res
   }
 }