diff --git a/lib/crypto_backend/crypto_cipher_kernel.c b/lib/crypto_backend/crypto_cipher_kernel.c
index 77b3643f..50b00317 100644
--- a/lib/crypto_backend/crypto_cipher_kernel.c
+++ b/lib/crypto_backend/crypto_cipher_kernel.c
@@ -164,7 +164,7 @@ static int _crypt_cipher_crypt(struct crypt_cipher_kernel *ctx,
 		header->cmsg_len = iv_msg_size;
 		alg_iv = (void*)CMSG_DATA(header);
 		alg_iv->ivlen = iv_length;
-		memcpy(alg_iv->iv, iv, iv_length);
+		crypt_backend_memcpy(alg_iv->iv, iv, iv_length);
 	}
 
 	len = sendmsg(ctx->opfd, &msg, 0);
diff --git a/lib/crypto_backend/crypto_gcrypt.c b/lib/crypto_backend/crypto_gcrypt.c
index 8e3f14e4..5b12088e 100644
--- a/lib/crypto_backend/crypto_gcrypt.c
+++ b/lib/crypto_backend/crypto_gcrypt.c
@@ -263,7 +263,7 @@ int crypt_hash_final(struct crypt_hash *ctx, char *buffer, size_t length)
 	if (!hash)
 		return -EINVAL;
 
-	memcpy(buffer, hash, length);
+	crypt_backend_memcpy(buffer, hash, length);
 	crypt_hash_restart(ctx);
 
 	return 0;
@@ -337,7 +337,7 @@ int crypt_hmac_final(struct crypt_hmac *ctx, char *buffer, size_t length)
 	if (!hash)
 		return -EINVAL;
 
-	memcpy(buffer, hash, length);
+	crypt_backend_memcpy(buffer, hash, length);
 	crypt_hmac_restart(ctx);
 
 	return 0;
diff --git a/lib/crypto_backend/crypto_nettle.c b/lib/crypto_backend/crypto_nettle.c
index f08db748..837fed8d 100644
--- a/lib/crypto_backend/crypto_nettle.c
+++ b/lib/crypto_backend/crypto_nettle.c
@@ -313,7 +313,7 @@ int crypt_hmac_init(struct crypt_hmac **ctx, const char *name,
 		return -ENOMEM;
 	}
 
-	memcpy(h->key, key, key_length);
+	crypt_backend_memcpy(h->key, key, key_length);
 	h->key_length = key_length;
 
 	h->hash->init(&h->nettle_ctx);
diff --git a/lib/crypto_backend/crypto_nss.c b/lib/crypto_backend/crypto_nss.c
index 6b390a4a..e394d16c 100644
--- a/lib/crypto_backend/crypto_nss.c
+++ b/lib/crypto_backend/crypto_nss.c
@@ -177,7 +177,7 @@ int crypt_hash_final(struct crypt_hash *ctx, char *buffer, size_t length)
 	if (PK11_DigestFinal(ctx->md, tmp, &tmp_len, length) != SECSuccess)
 		return -EINVAL;
 
-	memcpy(buffer, tmp, length);
+	crypt_backend_memcpy(buffer, tmp, length);
 	crypt_backend_memzero(tmp, sizeof(tmp));
 
 	if (tmp_len < length)
@@ -278,7 +278,7 @@ int crypt_hmac_final(struct crypt_hmac *ctx, char *buffer, size_t length)
 	if (PK11_DigestFinal(ctx->md, tmp, &tmp_len, length) != SECSuccess)
 		return -EINVAL;
 
-	memcpy(buffer, tmp, length);
+	crypt_backend_memcpy(buffer, tmp, length);
 	crypt_backend_memzero(tmp, sizeof(tmp));
 
 	if (tmp_len < length)
diff --git a/lib/crypto_backend/crypto_openssl.c b/lib/crypto_backend/crypto_openssl.c
index 4e853844..8276d561 100644
--- a/lib/crypto_backend/crypto_openssl.c
+++ b/lib/crypto_backend/crypto_openssl.c
@@ -402,7 +402,7 @@ int crypt_hash_final(struct crypt_hash *ctx, char *buffer, size_t length)
 	if (EVP_DigestFinal_ex(ctx->md, tmp, &tmp_len) != 1)
 		return -EINVAL;
 
-	memcpy(buffer, tmp, length);
+	crypt_backend_memcpy(buffer, tmp, length);
 	crypt_backend_memzero(tmp, sizeof(tmp));
 
 	if (tmp_len < length)
@@ -531,7 +531,7 @@ int crypt_hmac_final(struct crypt_hmac *ctx, char *buffer, size_t length)
 
 	HMAC_Final(ctx->md, tmp, &tmp_len);
 #endif
-	memcpy(buffer, tmp, length);
+	crypt_backend_memcpy(buffer, tmp, length);
 	crypt_backend_memzero(tmp, sizeof(tmp));
 
 	if (tmp_len < length)