diff --git a/config.def.h b/config.def.h
index c4625fa..46dde73 100644
--- a/config.def.h
+++ b/config.def.h
@@ -108,6 +108,7 @@ static const char *const autostart[] = {
 "xrdb", "/home/ganome/.Xresources", NULL,
 "sh", "/home/ganome/.local/bin/wallsetter.dwm", NULL,
 "parcellite", NULL,
+"picom", "-b", NULL,
 	NULL /* terminate */
 };