2 files changed, 2 insertions, 2 deletions
diff --git a/src/manage.c b/src/manage.c
index 0c1877d..4296480 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -447,7 +447,7 @@ unmanage (rp_window *w)
 
 /* When starting up scan existing windows and start managing them. */
 void
-scanwins ()
+scanwins (void)
 {
   rp_window *win;
   XWindowAttributes attr;
diff --git a/src/manage.h b/src/manage.h
index 22bb169..130ca65 100644
--- a/src/manage.h
+++ b/src/manage.h
@@ -29,7 +29,7 @@ char *list_unmanaged_windows (void);
 void add_unmanaged_window (char *name);
 int unmanaged_window (Window w);
 rp_screen* current_screen (void);
-void scanwins ();
+void scanwins (void);
 void unmanage (rp_window *w);
 int update_window_name (rp_window *win);
 void update_normal_hints (rp_window *win);