Fix parameter name in Doxygen documentation
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 90f5b64..8988be1 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -574,11 +574,12 @@
*
* For example, `PSA_ALG_HMAC(PSA_ALG_SHA256)` is HMAC-SHA-256.
*
- * \param alg A hash algorithm (\c PSA_ALG_XXX value such that
- * #PSA_ALG_IS_HASH(alg) is true).
+ * \param hash_alg A hash algorithm (\c PSA_ALG_XXX value such that
+ * #PSA_ALG_IS_HASH(alg) is true).
*
- * \return The corresponding HMAC algorithm.
- * \return Unspecified if \p alg is not a hash algorithm.
+ * \return The corresponding HMAC algorithm.
+ * \return Unspecified if \p alg is not a supported
+ * hash algorithm.
*/
#define PSA_ALG_HMAC(hash_alg) \
(PSA_ALG_HMAC_BASE | ((hash_alg) & PSA_ALG_HASH_MASK))