diff --git a/include/psa/crypto_driver_common.h b/include/psa/crypto_driver_common.h
index 1b6f322..26363c6 100644
--- a/include/psa/crypto_driver_common.h
+++ b/include/psa/crypto_driver_common.h
@@ -42,6 +42,9 @@
  * of these types. */
 #include "crypto_types.h"
 #include "crypto_values.h"
+/* Include size definitions which are used to size some arrays in operation
+ * structures. */
+#include <psa/crypto_sizes.h>
 
 /** For encrypt-decrypt functions, whether the operation is an encryption
  * or a decryption. */
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index 1310bb5..3ee0482 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -30,6 +30,7 @@
 
 #include "mbedtls/platform_util.h"
 
+#include "crypto_types.h"
 #include "crypto_compat.h"
 
 #ifdef __cplusplus
diff --git a/include/psa/crypto_struct.h b/include/psa/crypto_struct.h
index f08fdc8..23a02a5 100644
--- a/include/psa/crypto_struct.h
+++ b/include/psa/crypto_struct.h
@@ -184,7 +184,7 @@
     unsigned int info_set : 1;
     uint8_t output_block[PSA_HASH_MAX_SIZE];
     uint8_t prk[PSA_HASH_MAX_SIZE];
-    psa_mac_operation_t hmac;
+    struct psa_mac_operation_s hmac;
 } psa_hkdf_key_derivation_t;
 #endif /* MBEDTLS_PSA_BUILTIN_ALG_HKDF */