diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index d5e713e..e8d37a7 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -1996,6 +1996,14 @@
  *
  * \retval #PSA_SUCCESS
  *         Success.
+ * \retval #PSA_ERROR_INVALID_ARGUMENT
+ *         The total input size passed to this operation is not valid for
+ *         this particular algorithm. For example, the algorithm is a based
+ *         on block cipher and requires a whole number of blocks, but the
+ *         total input size is not a multiple of the block size.
+ * \retval #PSA_ERROR_INVALID_PADDING
+ *         This is a decryption operation for an algorithm that includes
+ *         padding, and the ciphertext does not contain valid padding.
  * \retval #PSA_ERROR_BAD_STATE
  *         The operation state is not valid (not set up, IV required but
  *         not set, or already completed).
diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index b53e1c7..fc0f963 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -149,7 +149,7 @@
  *
  * \warning If a function returns this error, it is undetermined
  * whether the requested action has completed or not. Implementations
- * should return #PSA_SUCCESS on successful completion whenver
+ * should return #PSA_SUCCESS on successful completion whenever
  * possible, however functions may return #PSA_ERROR_COMMUNICATION_FAILURE
  * if the requested action was completed successfully in an external
  * cryptoprocessor but there was a breakdown of communication before