diff --git a/sources/qetproject.cpp b/sources/qetproject.cpp
index 18429779d..8b5171a21 100644
--- a/sources/qetproject.cpp
+++ b/sources/qetproject.cpp
@@ -160,6 +160,11 @@ QETProject::~QETProject()
 		//We block database signal to avoid hundreds of unnecessary emitted signal
 		//due to deletion (diagram, item, etc...) and as much update made in the not yet deleted things.
 	m_data_base.blockSignals(true);
+		//Same reasoning for the rebuild itself : destroying a table relinks
+		//the tables that were chained to it, which re-queries the database,
+		//which rebuilds it completely -- for a project that is on its way out.
+		//Nothing can observe the result : the database is destroyed with it.
+	m_data_base.setUpdateBlocked(true);
 
 		//Each time a diagram is deleted we also remove it from m_diagram_list
 		//because a lot of thing append during the destructor of a diagram class