diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 4c8cc40fd2..e57f5647e8 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -1205,10 +1205,10 @@ void psa_key_policy_set_usage(psa_key_policy_t *policy,
                               psa_algorithm_t alg);
 
 /** \brief Retrieve the usage field of a policy structure. */
-psa_key_usage_t psa_key_policy_get_usage(psa_key_policy_t *policy);
+psa_key_usage_t psa_key_policy_get_usage(const psa_key_policy_t *policy);
 
 /** \brief Retrieve the algorithm field of a policy structure. */
-psa_algorithm_t psa_key_policy_get_algorithm(psa_key_policy_t *policy);
+psa_algorithm_t psa_key_policy_get_algorithm(const psa_key_policy_t *policy);
 
 /** \brief Set the usage policy on a key slot.
  *
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 50a99904c5..fce9e3c821 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -2585,12 +2585,12 @@ void psa_key_policy_set_usage( psa_key_policy_t *policy,
     policy->alg = alg;
 }
 
-psa_key_usage_t psa_key_policy_get_usage( psa_key_policy_t *policy )
+psa_key_usage_t psa_key_policy_get_usage( const psa_key_policy_t *policy )
 {
     return( policy->usage );
 }
 
-psa_algorithm_t psa_key_policy_get_algorithm( psa_key_policy_t *policy )
+psa_algorithm_t psa_key_policy_get_algorithm( const psa_key_policy_t *policy )
 {
     return( policy->alg );
 }