diff --git a/programs/psa/hmac_demo.c b/programs/psa/hmac_demo.c
index 6ed8298..a85de00 100644
--- a/programs/psa/hmac_demo.c
+++ b/programs/psa/hmac_demo.c
@@ -82,7 +82,7 @@
  * This function demonstrates computation of the HMAC of two messages using
  * the multipart API.
  */
-psa_status_t hmac_demo(void)
+static psa_status_t hmac_demo(void)
 {
     psa_status_t status;
     const psa_algorithm_t alg = PSA_ALG_HMAC(PSA_ALG_SHA_256);
diff --git a/programs/psa/psa_constant_names.c b/programs/psa/psa_constant_names.c
index 0baf4a0..7905b52 100644
--- a/programs/psa/psa_constant_names.c
+++ b/programs/psa/psa_constant_names.c
@@ -192,7 +192,7 @@
     TYPE_STATUS,
 } signed_value_type;
 
-int process_signed(signed_value_type type, long min, long max, char **argp)
+static int process_signed(signed_value_type type, long min, long max, char **argp)
 {
     for (; *argp != NULL; argp++) {
         char buffer[200];
@@ -231,7 +231,7 @@
     TYPE_KEY_USAGE,
 } unsigned_value_type;
 
-int process_unsigned(unsigned_value_type type, unsigned long max, char **argp)
+static int process_unsigned(unsigned_value_type type, unsigned long max, char **argp)
 {
     for (; *argp != NULL; argp++) {
         char buffer[200];