diff --git a/include/wx/popupwin.h b/include/wx/popupwin.h
index 03bb274c5a..4f451a644e 100644
--- a/include/wx/popupwin.h
+++ b/include/wx/popupwin.h
@@ -132,7 +132,9 @@ protected:
     // get alerted when child gets deleted from under us
     void OnDestroy(wxWindowDestroyEvent& event);
 
-#if defined( __WXMSW__ ) || defined( __WXMAC__)
+    // wxOSX/Carbon doesn't generate mouse capture loss events currently so
+    // poll for the capture loss ourselves.
+#if wxOSX_USE_CARBON
     // check if the mouse needs captured or released
     void OnIdle(wxIdleEvent& event);
 #endif
diff --git a/src/common/popupcmn.cpp b/src/common/popupcmn.cpp
index 6aef738e9d..36445b9087 100644
--- a/src/common/popupcmn.cpp
+++ b/src/common/popupcmn.cpp
@@ -76,6 +76,7 @@ public:
 protected:
     // event handlers
     void OnLeftDown(wxMouseEvent& event);
+    void OnCaptureLost(wxMouseCaptureLostEvent& event);
 
 private:
     wxPopupTransientWindow *m_popup;
@@ -106,6 +107,7 @@ private:
 
 BEGIN_EVENT_TABLE(wxPopupWindowHandler, wxEvtHandler)
     EVT_LEFT_DOWN(wxPopupWindowHandler::OnLeftDown)
+    EVT_MOUSE_CAPTURE_LOST(wxPopupWindowHandler::OnCaptureLost)
 END_EVENT_TABLE()
 
 BEGIN_EVENT_TABLE(wxPopupFocusHandler, wxEvtHandler)
@@ -114,7 +116,7 @@ BEGIN_EVENT_TABLE(wxPopupFocusHandler, wxEvtHandler)
 END_EVENT_TABLE()
 
 BEGIN_EVENT_TABLE(wxPopupTransientWindow, wxPopupWindow)
-#if defined( __WXMSW__ ) || ( defined( __WXMAC__ ) && wxOSX_USE_CARBON )
+#if wxOSX_USE_CARBON
     EVT_IDLE(wxPopupTransientWindow::OnIdle)
 #endif
 END_EVENT_TABLE()
@@ -424,7 +426,7 @@ bool wxPopupTransientWindow::ProcessLeftDown(wxMouseEvent& WXUNUSED(event))
     return false;
 }
 
-#if defined( __WXMSW__ ) || ( defined( __WXMAC__ ) && wxOSX_USE_CARBON )
+#if wxOSX_USE_CARBON
 void wxPopupTransientWindow::OnIdle(wxIdleEvent& event)
 {
     event.Skip();
@@ -450,7 +452,7 @@ void wxPopupTransientWindow::OnIdle(wxIdleEvent& event)
         }
     }
 }
-#endif // __WXMSW__
+#endif // wxOSX/Carbon
 
 
 #if wxUSE_COMBOBOX && defined(__WXUNIVERSAL__)
@@ -600,6 +602,15 @@ void wxPopupWindowHandler::OnLeftDown(wxMouseEvent& event)
 #endif // __WXUNIVERSAL__ && wxUSE_SCROLLBAR
 }
 
+void
+wxPopupWindowHandler::OnCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(event))
+{
+    m_popup->DismissAndNotify();
+
+    // There is no need to skip the event here, normally we've already dealt
+    // with the focus loss.
+}
+
 // ----------------------------------------------------------------------------
 // wxPopupFocusHandler
 // ----------------------------------------------------------------------------