diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index 3684e98..fbf25e6 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -91,6 +91,7 @@
             if( taglen == 0 )
                 return( PSA_ALG_CBC_NO_PADDING );
             /* Intentional fallthrough for taglen != 0 */
+            /* fallthrough */
         default:
             return( 0 );
     }