diff --git a/include/psa/crypto_builtin_composites.h b/include/psa/crypto_builtin_composites.h
index e1acf39..3b0f82a 100644
--- a/include/psa/crypto_builtin_composites.h
+++ b/include/psa/crypto_builtin_composites.h
@@ -63,12 +63,9 @@
 {
     psa_algorithm_t alg;
     unsigned int key_set : 1;
-    unsigned int iv_required : 1;
-    unsigned int iv_set : 1;
     unsigned int has_input : 1;
     unsigned int is_sign : 1;
     uint8_t mac_size;
-    unsigned int id;
     union
     {
         unsigned dummy; /* Make the union non-empty even with no supported algorithms. */
@@ -81,7 +78,7 @@
     } ctx;
 } mbedtls_psa_mac_operation_t;
 
-#define MBEDTLS_PSA_MAC_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, {0}}
+#define MBEDTLS_PSA_MAC_OPERATION_INIT {0, 0, 0, 0, 0, {0}}
 
 /*
  * BEYOND THIS POINT, TEST DRIVER DECLARATIONS ONLY.