diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 9f0b135..896235b 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -1174,6 +1174,7 @@
  * \retval #PSA_SUCCESS
  * \retval #PSA_ERROR_EMPTY_SLOT
  * \retval #PSA_ERROR_NOT_PERMITTED
+ * \retval #PSA_ERROR_NOT_SUPPORTED
  * \retval #PSA_ERROR_COMMUNICATION_FAILURE
  * \retval #PSA_ERROR_HARDWARE_FAILURE
  * \retval #PSA_ERROR_TAMPERING_DETECTED