diff --git a/docs/psa-transition.md b/docs/psa-transition.md
index 8cb94ccd53..067ffafbd3 100644
--- a/docs/psa-transition.md
+++ b/docs/psa-transition.md
@@ -240,7 +240,7 @@ There is currently [no PSA equivalent to the self-tests](https://github.com/Mbed
 
 ### Error messages
 
-At the time of writing, there is no equivalent to the error messages provided by `mbedtls_strerror`. However, you can use the companion program `programs/psa/psa_constant_names` to convert various numbers (`psa_status_t`, `psa_algorithm_t`, `psa_key_type_t`, `psa_ecc_family_t`, `psa_dh_family_t`, `psa_key_usage_t`) to their input representation. The conversion doesn't depend on the library configuration or the target platform, so you can use a native build of this program even if you cross-compile your application.
+At the time of writing, there is no equivalent to the error messages provided by `mbedtls_strerror`. However, you can use the companion program `programs/psa/psa_constant_names` to convert various numbers (`psa_status_t`, `psa_algorithm_t`, `psa_key_type_t`, `psa_ecc_family_t`, `psa_dh_family_t`, `psa_key_usage_t`) to a programmer-friendly representation. The conversion doesn't depend on the library configuration or the target platform, so you can use a native build of this program even if you cross-compile your application.
 
 ```
 $ programs/psa/psa_constant_names error -138