diff --git a/ths_config.txt b/ths_config.txt
index 2f44e87..f87f698 100644
--- a/ths_config.txt
+++ b/ths_config.txt
@@ -104,3 +104,4 @@ cache_dir                   = "./cache/"
 fig_x_height_inches         = 12100
 fig_y_height_inches         =  8075
 default_target_dir          = UseSourceDir
+default_source_dir          = "."