diff --git a/lib/openmsx/boot_env.tcl b/lib/openmsx/boot_env.tcl
index d1c7933..8d2e6d0 100644
--- a/lib/openmsx/boot_env.tcl
+++ b/lib/openmsx/boot_env.tcl
@@ -6,8 +6,8 @@
 # SAVE_SETTINGS_ON_EXIT=false
 # Disables automatic settings saving.
 #
-# RENDERER=none
-# Disables video output, to enable video use 'SDL' as argument.
+# RENDERER=SDL
+# Override video output from command line.
 #
 # THROTTLE=off
 # Disables msx speed emulation.