Update docs/getting_started.md
Co-Authored-By: Gilles Peskine <gilles.peskine@arm.com>
diff --git a/docs/getting_started.md b/docs/getting_started.md
index 6b87fa8..b4a2554 100644
--- a/docs/getting_started.md
+++ b/docs/getting_started.md
@@ -557,7 +557,7 @@
1. Provide `secret` with `psa_key_derivation_input_key()`, referencing a key that
can be used for key derivation.
1. Set the key attributes desired for the new derived key. We'll set
- the `PSA_KEY_USAGE_ENCRYPT` parameter and the `PSA_ALG_CTR` algorithm for this
+ the `PSA_KEY_USAGE_ENCRYPT` usage flag and the `PSA_ALG_CTR` algorithm for this
example.
1. Derive the key by calling `psa_key_derivation_output_key()`.
1. Clean up the key derivation context.