diff --git a/examples/basic.c b/examples/basic.c
index 0f144e2..a4ef340 100644
--- a/examples/basic.c
+++ b/examples/basic.c
@@ -20,11 +20,11 @@
 #define KA_INTERVAL 1
 
 /* define a handler for connection events */
-void conn_handler(xmpp_conn_t *conn,
-                  xmpp_conn_event_t status,
-                  int error,
-                  xmpp_stream_error_t *stream_error,
-                  void *userdata)
+static void conn_handler(xmpp_conn_t *conn,
+                         xmpp_conn_event_t status,
+                         int error,
+                         xmpp_stream_error_t *stream_error,
+                         void *userdata)
 {
     xmpp_ctx_t *ctx = (xmpp_ctx_t *)userdata;
     int secured;
diff --git a/src/tls_gnutls.c b/src/tls_gnutls.c
index b7dd3f2..bd754cc 100644
--- a/src/tls_gnutls.c
+++ b/src/tls_gnutls.c
@@ -123,10 +123,10 @@ static int _tls_get_id_on_xmppaddr(xmpp_conn_t *conn,
     return GNUTLS_E_X509_UNKNOWN_SAN;
 }
 
-int _tls_id_on_xmppaddr(xmpp_conn_t *conn,
-                        gnutls_x509_crt_t cert,
-                        unsigned int n,
-                        char **ret)
+static int _tls_id_on_xmppaddr(xmpp_conn_t *conn,
+                               gnutls_x509_crt_t cert,
+                               unsigned int n,
+                               char **ret)
 {
     int res = GNUTLS_E_SUCCESS;
     unsigned int i, j;