diff --git a/library/psa_crypto_slot_management.c b/library/psa_crypto_slot_management.c
index a21388a0b3..3d997a50c7 100644
--- a/library/psa_crypto_slot_management.c
+++ b/library/psa_crypto_slot_management.c
@@ -250,7 +250,8 @@ static psa_status_t psa_load_persistent_key_into_slot(psa_key_slot_t *slot)
             slot, data->slot_number, sizeof(data->slot_number));
 
         if (status == PSA_SUCCESS) {
-            slot->status = PSA_SLOT_OCCUPIED;
+            status = psa_key_slot_state_transition(slot, PSA_SLOT_FILLING,
+                                                   PSA_SLOT_FULL);
         }
         goto exit;
     }
@@ -261,7 +262,8 @@ static psa_status_t psa_load_persistent_key_into_slot(psa_key_slot_t *slot)
         goto exit;
     }
 
-    slot->status = PSA_SLOT_OCCUPIED;
+    status = psa_key_slot_state_transition(slot, PSA_SLOT_FILLING,
+                                           PSA_SLOT_FULL);
 
 exit:
     psa_free_persistent_key_data(key_data, key_data_length);
@@ -335,8 +337,9 @@ static psa_status_t psa_load_builtin_key_into_slot(psa_key_slot_t *slot)
     /* Copy actual key length and core attributes into the slot on success */
     slot->key.bytes = key_buffer_length;
     slot->attr = attributes.core;
-    slot->status = PSA_SLOT_OCCUPIED;
 
+    status = psa_key_slot_state_transition(slot, PSA_SLOT_FILLING,
+                                           PSA_SLOT_FULL);
 exit:
     if (status != PSA_SUCCESS) {
         psa_remove_key_data_from_memory(slot);