diff --git a/defaults/main.yml b/defaults/main.yml
index efb5dcd..7e26461 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -185,6 +185,8 @@ galaxy_app_config_default:
   citation_cache_data_dir: "{{ galaxy_cache_dir }}/citations/data"
   citation_cache_lock_dir: "{{ galaxy_cache_dir }}/citations/locks"
   new_file_path: "{{ galaxy_mutable_data_dir }}/tmp"
+  mulled_resolution_cache_data_dir: "{{ galaxy_mutable_data_dir }}/mulled/data"
+  mulled_resolution_cache_lock_dir: "{{ galaxy_mutable_data_dir }}/mulled/lock"
 
   # Mutable config files
   integrated_tool_panel_config: "{{ galaxy_mutable_config_dir }}/integrated_tool_panel.xml"