1 files changed, 2 insertions, 0 deletions
diff --git a/lib/hmac.c b/lib/hmac.c
index 85b175d..dfb0db5 100644
--- a/lib/hmac.c
+++ b/lib/hmac.c
@@ -18,6 +18,8 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
+ * SPDX-License-Identifier: curl
+ *
  * RFC2104 Keyed-Hashing for Message Authentication
  *
  ***************************************************************************/