diff --git a/crates/net/ecies/src/mac.rs b/crates/net/ecies/src/mac.rs
index fcccae7267..5d25c214c0 100644
--- a/crates/net/ecies/src/mac.rs
+++ b/crates/net/ecies/src/mac.rs
@@ -57,7 +57,7 @@ impl MAC {
         self.hasher.update(data);
         let prev = self.digest();
         let aes = Aes256Enc::new_from_slice(self.secret.as_ref()).unwrap();
-        let mut encrypted = self.digest().0;
+        let mut encrypted = prev.0;
 
         aes.encrypt_padded::<NoPadding>(&mut encrypted, B128::len_bytes()).unwrap();
         for i in 0..16 {