diff --git a/src/common/appcmn.cpp b/src/common/appcmn.cpp
index 49dfb98eed..608a40ea4e 100644
--- a/src/common/appcmn.cpp
+++ b/src/common/appcmn.cpp
@@ -141,7 +141,15 @@ void wxAppBase::ProcessPendingEvents()
 
 void wxAppBase::SetActive(bool active, wxWindow * WXUNUSED(lastFocus))
 {
+    if ( active == m_isActive )
+        return;
+
     m_isActive = active;
+
+    wxActivateEvent event(wxEVT_ACTIVATE_APP, active);
+    event.SetEventObject(this);
+
+    (void)ProcessEvent(event);
 }
 
 #endif // wxUSE_GUI
diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 8f73c4e2db..9b8f1de926 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -2786,11 +2786,6 @@ void wxWindowGTK::OnInternalIdle()
         g_sendActivateEvent = -1;
 
         wxTheApp->SetActive(activate, (wxWindow *)g_focusWindowLast);
-
-        wxActivateEvent event(wxEVT_ACTIVATE_APP, activate, GetId());
-        event.SetEventObject(this);
-
-        (void)GetEventHandler()->ProcessEvent(event);
     }
 
     wxCursor cursor = m_cursor;
diff --git a/src/gtk1/window.cpp b/src/gtk1/window.cpp
index 8f73c4e2db..9b8f1de926 100644
--- a/src/gtk1/window.cpp
+++ b/src/gtk1/window.cpp
@@ -2786,11 +2786,6 @@ void wxWindowGTK::OnInternalIdle()
         g_sendActivateEvent = -1;
 
         wxTheApp->SetActive(activate, (wxWindow *)g_focusWindowLast);
-
-        wxActivateEvent event(wxEVT_ACTIVATE_APP, activate, GetId());
-        event.SetEventObject(this);
-
-        (void)GetEventHandler()->ProcessEvent(event);
     }
 
     wxCursor cursor = m_cursor;