diff --git a/i3lock.c b/i3lock.c
index bd5008d..bab41e0 100644
--- a/i3lock.c
+++ b/i3lock.c
@@ -105,7 +105,7 @@ bool skip_repeated_empty_password = false;
  * Decrements i to point to the previous unicode glyph
  *
  */
-void u8_dec(char *s, int *i) {
+static void u8_dec(char *s, int *i) {
     (void)(isutf(s[--(*i)]) || isutf(s[--(*i)]) || isutf(s[--(*i)]) || --(*i));
 }
 
@@ -613,7 +613,7 @@ static void process_xkb_event(xcb_generic_event_t *gevent) {
  * and also redraw the image, if any.
  *
  */
-void handle_screen_resize(void) {
+static void handle_screen_resize(void) {
     xcb_get_geometry_cookie_t geomc;
     xcb_get_geometry_reply_t *geom;
     geomc = xcb_get_geometry(conn, screen->root);