diff --git a/object_boolean_tools.py b/object_boolean_tools.py
index 29be8b18cffb0b562c75e96ad20a07d89e9c4076..96593d4c2a70809df4fbe93df697b4aef532c77e 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):