diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index c54fc9a..d5c62de 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -105,8 +105,8 @@
  * descriptions for permitted sequencing of functions.
  *
  * Implementations shall not return this error code to indicate
- * that a key slot is occupied when it needs to be free or vice versa,
- * but shall return #PSA_ERROR_ALREADY_EXISTS or #PSA_ERROR_DOES_NOT_EXIST
+ * that a key either exists or not,
+ * but shall instead return #PSA_ERROR_ALREADY_EXISTS or #PSA_ERROR_DOES_NOT_EXIST
  * as applicable. */
 #define PSA_ERROR_BAD_STATE             ((psa_status_t)-137)
 
@@ -116,7 +116,7 @@
  * combination of parameters are recognized as invalid.
  *
  * Implementations shall not return this error code to indicate
- * that a key slot is occupied when it needs to be free or vice versa,
+ * that a key either exists or not,
  * but shall return #PSA_ERROR_ALREADY_EXISTS or #PSA_ERROR_DOES_NOT_EXIST
  * as applicable.
  *