diff --git a/src/systray/systraybar.c b/src/systray/systraybar.c
index 7fe2c84..0f130ce 100644
--- a/src/systray/systraybar.c
+++ b/src/systray/systraybar.c
@@ -679,7 +679,7 @@ gboolean add_icon(Window win)
             win,
             name,
             pid,
-            attr.visual,
+            (void*)attr.visual,
             attr.colormap,
             attr.depth,
             attr.width,