diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index bbd6b24..0660ee4 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -1786,6 +1786,7 @@
      * definition. */
 
     slot->attr = attributes->core;
+    slot->status = PSA_SLOT_OCCUPIED;
     if (PSA_KEY_LIFETIME_IS_VOLATILE(slot->attr.lifetime)) {
 #if !defined(MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER)
         slot->attr.id = volatile_key_id;