1 files changed, 4 insertions, 0 deletions
diff --git a/src/mac/hmac/hmac.h b/src/mac/hmac/hmac.h
index cb5bd6917..39a084874 100644
--- a/src/mac/hmac/hmac.h
+++ b/src/mac/hmac/hmac.h
@@ -34,6 +34,10 @@ class BOTAN_DLL HMAC : public MessageAuthenticationCode
       * @param hash the hash to use for HMACing
       */
       HMAC(HashFunction* hash);
+
+      HMAC(const HMAC&) = delete;
+      HMAC& operator=(const HMAC&) = delete;
+
       ~HMAC() { delete hash; }
    private:
       void add_data(const byte[], size_t);