diff --git a/Polyhedron/demo/Polyhedron/Polyhedron_demo.cpp b/Polyhedron/demo/Polyhedron/Polyhedron_demo.cpp
index 45add22401f..aaddc1fcb72 100644
--- a/Polyhedron/demo/Polyhedron/Polyhedron_demo.cpp
+++ b/Polyhedron/demo/Polyhedron/Polyhedron_demo.cpp
@@ -100,6 +100,7 @@ Polyhedron_demo::~Polyhedron_demo() {}
 
 void Polyhedron_demo::do_not_catch_exceptions() {
   d_ptr->catch_exceptions = false;
+  setProperty("no-try-catch", true);
 }
 
 bool Polyhedron_demo::notify(QObject* receiver, QEvent* event)
diff --git a/Three/include/CGAL/Three/exceptions.h b/Three/include/CGAL/Three/exceptions.h
index ad088abaa3c..137df71a3c1 100644
--- a/Three/include/CGAL/Three/exceptions.h
+++ b/Three/include/CGAL/Three/exceptions.h
@@ -23,6 +23,7 @@
 
 #include <exception>
 #include <QString>
+#include <QApplication>
 #include <QScriptable>
 #include <QScriptContext>
 #include <QScriptEngine>
@@ -81,7 +82,8 @@ wrap_a_call_to_cpp(Callable f,
   typedef Optional_or_bool<Callable_RT> O_r_b;
   typedef typename O_r_b::type Return_type;
 
-  if(qs == 0 || !qs->context()) return O_r_b::invoke(f);
+  const bool no_try_catch = qApp->property("no-try-catch").toBool();
+  if(no_try_catch || qs == 0 || !qs->context()) return O_r_b::invoke(f);
   else
     try {
       return O_r_b::invoke(f);