diff --git a/objects/client.c b/objects/client.c
index 264a04c45..800e541bf 100644
--- a/objects/client.c
+++ b/objects/client.c
@@ -195,7 +195,7 @@ client_unfocus_update(client_t *c)
 /** Unfocus a client.
  * \param c The client.
  */
-void
+static void
 client_unfocus(client_t *c)
 {
 
diff --git a/objects/client.h b/objects/client.h
index a74158454..2ce1bc3ab 100644
--- a/objects/client.h
+++ b/objects/client.h
@@ -170,7 +170,6 @@ void client_set_icon(lua_State *, int, int);
 void client_set_skip_taskbar(lua_State *, int, bool);
 void client_focus(client_t *);
 void client_focus_update(client_t *);
-void client_unfocus(client_t *);
 bool client_hasproto(client_t *, xcb_atom_t);
 void client_set_focus(client_t *, bool);
 void client_ignore_enterleave_events(void);