diff --git a/src/msw/display.cpp b/src/msw/display.cpp
index 993b3cdaa9..7c23d54f15 100644
--- a/src/msw/display.cpp
+++ b/src/msw/display.cpp
@@ -198,10 +198,6 @@ public:
         DoRefreshMonitors();
     }
 
-    // Called when we receive WM_SETTINGCHANGE to refresh the list of monitor
-    // handles.
-    static void RefreshMonitors() { ms_factory->InvalidateCache(); }
-
     // Declare the second argument as int to avoid problems with older SDKs not
     // declaring MONITOR_DPI_TYPE enum.
     typedef HRESULT (WINAPI *GetDpiForMonitor_t)(HMONITOR, int, UINT*, UINT*);
@@ -221,15 +217,9 @@ private:
     // return wxNOT_FOUND if not found
     int FindDisplayFromHMONITOR(HMONITOR hmon) const;
 
-    // Update m_displays array, used by RefreshMonitors().
+    // Update m_displays array, used initially and by InvalidateCache().
     void DoRefreshMonitors();
 
-
-    // The unique factory being used (as we don't have direct access to the
-    // global factory pointer in the common code so we just duplicate this
-    // variable (also making it of correct type for us) here).
-    static wxDisplayFactoryMSW* ms_factory;
-
     // The pointer to GetDpiForMonitorPtr(), retrieved on demand, and the
     // related data, including the DLL containing the function that we must
     // keep loaded.
@@ -285,7 +275,6 @@ private:
     wxDECLARE_NO_COPY_CLASS(wxDisplayFactoryMSW);
 };
 
-wxDisplayFactoryMSW* wxDisplayFactoryMSW::ms_factory = NULL;
 wxDisplayFactoryMSW::GetDpiForMonitorData
     wxDisplayFactoryMSW::ms_getDpiForMonitorData;
 
@@ -547,12 +536,6 @@ wxDisplayWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 
 wxDisplayFactoryMSW::wxDisplayFactoryMSW()
 {
-    // This is not supposed to happen with the current code, the factory is
-    // implicitly a singleton.
-    wxASSERT_MSG( !ms_factory, wxS("Using more than one factory?") );
-
-    ms_factory = this;
-
     m_hiddenHwnd = NULL;
     m_hiddenClass = NULL;
 
@@ -592,8 +575,6 @@ wxDisplayFactoryMSW::~wxDisplayFactoryMSW()
         ms_getDpiForMonitorData.UnloadIfNecessary();
         ms_getDpiForMonitorData.m_initialized = false;
     }
-
-    ms_factory = NULL;
 }
 
 /* static */