diff --git a/object_boolean_tools.py b/object_boolean_tools.py
index 29be8b18..96593d4c 100644
--- a/object_boolean_tools.py
+++ b/object_boolean_tools.py
@@ -866,6 +866,7 @@ class VIEW3D_PT_booltool_tools(Panel):
     bl_space_type = "VIEW_3D"
     bl_region_type = "UI"
     bl_context = "objectmode"
+    bl_options = {'DEFAULT_CLOSED'}
 
     @classmethod
     def poll(cls, context):