diff --git a/include/psa/crypto_struct.h b/include/psa/crypto_struct.h
index db85a1ab15..adb33ed214 100644
--- a/include/psa/crypto_struct.h
+++ b/include/psa/crypto_struct.h
@@ -289,33 +289,7 @@ typedef uint16_t psa_key_attributes_flag_t;
 #define MBEDTLS_PSA_KA_MASK_DUAL_USE (          \
         0)
 
-typedef struct {
-#if defined(MBEDTLS_PSA_CRYPTO_SE_C)
-    psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number);
-#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
-    psa_key_type_t MBEDTLS_PRIVATE(type);
-    psa_key_bits_t MBEDTLS_PRIVATE(bits);
-    psa_key_lifetime_t MBEDTLS_PRIVATE(lifetime);
-    psa_key_policy_t MBEDTLS_PRIVATE(policy);
-    psa_key_attributes_flag_t MBEDTLS_PRIVATE(flags);
-    /* This type has a different layout in the client view wrt the
-     * service view of the key id, i.e. in service view usually is
-     * expected to have MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER defined
-     * thus adding an owner field to the standard psa_key_id_t. For
-     * implementations with client/service separation, this means the
-     * object will be marshalled through a transport channel and
-     * interpreted differently at each side of the transport. Placing
-     * it at the end of structures allows to interpret the structure
-     * at the client without reorganizing the memory layout of the
-     * struct
-     */
-    mbedtls_svc_key_id_t MBEDTLS_PRIVATE(id);
-} psa_core_key_attributes_t;
-
 struct psa_key_attributes_s {
-    union {
-        psa_core_key_attributes_t MBEDTLS_PRIVATE(core);
-        struct {
 #if defined(MBEDTLS_PSA_CRYPTO_SE_C)
     psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number);
 #endif /* MBEDTLS_PSA_CRYPTO_SE_C */
@@ -336,8 +310,6 @@ struct psa_key_attributes_s {
      * struct
      */
     mbedtls_svc_key_id_t MBEDTLS_PRIVATE(id);
-        };
-    };
 };
 
 #if defined(MBEDTLS_PSA_CRYPTO_SE_C)
@@ -345,13 +317,11 @@ struct psa_key_attributes_s {
 #else
 #define PSA_KEY_ATTRIBUTES_MAYBE_SLOT_NUMBER
 #endif
-#define PSA_CORE_KEY_ATTRIBUTES_INIT { PSA_KEY_ATTRIBUTES_MAYBE_SLOT_NUMBER \
-                                       PSA_KEY_TYPE_NONE, 0,            \
-                                       PSA_KEY_LIFETIME_VOLATILE,       \
-                                       PSA_KEY_POLICY_INIT, 0,          \
-                                       MBEDTLS_SVC_KEY_ID_INIT }
-
-#define PSA_KEY_ATTRIBUTES_INIT { { PSA_CORE_KEY_ATTRIBUTES_INIT } }
+#define PSA_KEY_ATTRIBUTES_INIT { PSA_KEY_ATTRIBUTES_MAYBE_SLOT_NUMBER \
+                                   PSA_KEY_TYPE_NONE, 0,            \
+                                   PSA_KEY_LIFETIME_VOLATILE,       \
+                                   PSA_KEY_POLICY_INIT, 0,          \
+                                   MBEDTLS_SVC_KEY_ID_INIT }
 
 static inline struct psa_key_attributes_s psa_key_attributes_init(void)
 {