diff --git a/src/frontends/qt3/lyx_gui.C b/src/frontends/qt3/lyx_gui.C
index 56a4979987..f4d5a123ac 100644
--- a/src/frontends/qt3/lyx_gui.C
+++ b/src/frontends/qt3/lyx_gui.C
@@ -114,7 +114,6 @@ class LQApplication : public QApplication
 {
 public:
 	LQApplication(int & argc, char ** argv);
-	~LQApplication();
 #ifdef Q_WS_X11
 	bool x11EventFilter (XEvent * ev) { return lyxX11EventFilter(ev); }
 #endif
@@ -135,10 +134,6 @@ LQApplication::LQApplication(int & argc, char ** argv)
 }
 
 
-LQApplication::~LQApplication()
-{}
-
-
 #ifdef Q_WS_MACX
 bool LQApplication::macEventFilter(EventRef event)
 {
diff --git a/src/frontends/qt4/lyx_gui.C b/src/frontends/qt4/lyx_gui.C
index e94105b6f9..fe523c964c 100644
--- a/src/frontends/qt4/lyx_gui.C
+++ b/src/frontends/qt4/lyx_gui.C
@@ -110,7 +110,6 @@ class LQApplication : public QApplication
 {
 public:
 	LQApplication(int & argc, char ** argv);
-	~LQApplication();
 #ifdef Q_WS_X11
 	bool x11EventFilter (XEvent * ev) { return lyxX11EventFilter(ev); }
 #endif
@@ -131,10 +130,6 @@ LQApplication::LQApplication(int & argc, char ** argv)
 }
 
 
-LQApplication::~LQApplication()
-{}
-
-
 #ifdef Q_WS_MACX
 bool LQApplication::macEventFilter(EventRef event)
 {