diff --git a/config.def.h b/config.def.h
index f4ff7f3..562af4d 100644
--- a/config.def.h
+++ b/config.def.h
@@ -101,7 +101,7 @@ static const keymap_t keys[] = {
 	{ 0,            XK_Return,        g_switch_mode,        None },
 	{ 0,            XK_f,             g_toggle_fullscreen,  None },
 	{ 0,            XK_b,             g_toggle_bar,         None },
-	{ ControlMask,  XK_x,             g_prefix_external,    None },
+	{ 0,		XK_comma,         g_prefix_external,    None },
 	{ 0,            XK_g,             g_first,              None },
 	{ 0,            XK_G,             g_n_or_last,          None },
 	{ 0,            XK_r,             g_reload_image,       None },