diff --git a/tljh/config.py b/tljh/config.py
index 6dc2ed2..5911703 100644
--- a/tljh/config.py
+++ b/tljh/config.py
@@ -187,7 +187,7 @@ def show_config(config_path):
     yaml.dump(config, sys.stdout)
 
 
-def set_config_value(config_path, key_path, value, validate):
+def set_config_value(config_path, key_path, value, validate=True):
     """
     Set key at key_path in config_path to value
     """