diff --git a/sample_config.toml b/sample_config.toml
index 3157fd9..33a8165 100644
--- a/sample_config.toml
+++ b/sample_config.toml
@@ -8,6 +8,7 @@ notify = False
 fallback_wallpaper = "/path/to/paper"
 loglevel = "INFO"
 systray = true
+behavior = fill
 
 # Enter the hours at which you want the wallpaper to change.
 # If the script is called between one of this times, it will go back to the previous time.