diff --git a/MainWindow.h b/MainWindow.h
index fd5aa7f1..9c4e51a8 100644
--- a/MainWindow.h
+++ b/MainWindow.h
@@ -94,6 +94,7 @@ private slots:
 	void actionExportSTL();
 	void actionExportOFF();
 	void actionExportDXF();
+	void actionFlushCaches();
 
 public:
 	void viewModeActionsUncheck();
diff --git a/MainWindow.ui b/MainWindow.ui
index 3cb8d30a..a85859ad 100644
--- a/MainWindow.ui
+++ b/MainWindow.ui
@@ -156,6 +156,7 @@
     <addaction name="designActionExportSTL"/>
     <addaction name="designActionExportOFF"/>
     <addaction name="designActionExportDXF"/>
+    <addaction name="designActionFlushCaches"/>
    </widget>
    <widget class="QMenu" name="menu_View">
     <property name="title">
@@ -604,6 +605,11 @@
     <string>Ctrl+W</string>
    </property>
   </action>
+  <action name="designActionFlushCaches">
+   <property name="text">
+    <string>Flush Caches</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>
diff --git a/mainwin.cc b/mainwin.cc
index 742788f3..96577c92 100644
--- a/mainwin.cc
+++ b/mainwin.cc
@@ -195,6 +195,7 @@ MainWindow::MainWindow(const char *filename)
 	connect(this->designActionExportSTL, SIGNAL(triggered()), this, SLOT(actionExportSTL()));
 	connect(this->designActionExportOFF, SIGNAL(triggered()), this, SLOT(actionExportOFF()));
 	connect(this->designActionExportDXF, SIGNAL(triggered()), this, SLOT(actionExportDXF()));
+	connect(this->designActionFlushCaches, SIGNAL(triggered()), this, SLOT(actionFlushCaches()));
 
 	// View menu
 #ifndef ENABLE_OPENCSG
@@ -1130,6 +1131,12 @@ void MainWindow::actionExportDXF()
 #endif /* ENABLE_CGAL */
 }
 
+void MainWindow::actionFlushCaches()
+{
+	PolySet::ps_cache.clear();
+	AbstractNode::cgal_nef_cache.clear();
+}
+
 void MainWindow::viewModeActionsUncheck()
 {
 	viewActionOpenCSG->setChecked(false);
@@ -1683,3 +1690,4 @@ void MainWindow::closeEvent(QCloseEvent *event)
 		event->ignore();
 	}
 }
+