diff --git a/ssl/t1_enc.c b/ssl/t1_enc.c
index 96c85a4d1..1fe6731c3 100644
--- a/ssl/t1_enc.c
+++ b/ssl/t1_enc.c
@@ -1009,7 +1009,8 @@ int tls1_mac(SSL *ssl, unsigned char *md, int send)
 		}
 		else
 		{
-			EVP_MD_CTX_copy(&hmac,hash);
+			if (!EVP_MD_CTX_copy(&hmac,hash))
+				return -1;
 			mac_ctx = &hmac;
 		}