diff --git a/include/psa/crypto_struct.h b/include/psa/crypto_struct.h
index 36503f9..0f74c54 100644
--- a/include/psa/crypto_struct.h
+++ b/include/psa/crypto_struct.h
@@ -165,6 +165,9 @@
     psa_algorithm_t alg;
     psa_key_type_t key_type;
 
+    size_t ad_remaining;
+    size_t body_remaining;
+
     unsigned int nonce_set : 1;
     unsigned int lengths_set : 1;
     unsigned int ad_started : 1;
@@ -173,7 +176,7 @@
     psa_driver_aead_context_t ctx;
 };
 
-#define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, {0}}
+#define PSA_AEAD_OPERATION_INIT {0, 0, 0, 0, 0, 0, 0, 0, 0, {0}}
 static inline struct psa_aead_operation_s psa_aead_operation_init( void )
 {
     const struct psa_aead_operation_s v = PSA_AEAD_OPERATION_INIT;