diff --git a/tcl/package_ip.tcl b/tcl/package_ip.tcl
index 27fd975..e113f41 100644
--- a/tcl/package_ip.tcl
+++ b/tcl/package_ip.tcl
@@ -286,7 +286,7 @@ ipx::update_checksums [ipx::current_core]
 ipx::check_integrity [ipx::current_core]
 ipx::save_core [ipx::current_core]
 
-close_project
+close_project -delete
 
 puts "Done"