3 files changed, 11 insertions, 4 deletions
diff --git a/indra/llwindow/llwindowcallbacks.cpp b/indra/llwindow/llwindowcallbacks.cpp
index c160382c17..195f68e08b 100644
--- a/indra/llwindow/llwindowcallbacks.cpp
+++ b/indra/llwindow/llwindowcallbacks.cpp
@@ -194,6 +194,11 @@ bool LLWindowCallbacks::handleDPIChanged(LLWindow *window, F32 ui_scale_factor,
     return false;
 }
 
+bool LLWindowCallbacks::handleDisplayChanged()
+{
+    return false;
+}
+
 bool LLWindowCallbacks::handleWindowDidChangeScreen(LLWindow *window)
 {
     return false;
diff --git a/indra/llwindow/llwindowcallbacks.h b/indra/llwindow/llwindowcallbacks.h
index 63b585231f..d812f93524 100644
--- a/indra/llwindow/llwindowcallbacks.h
+++ b/indra/llwindow/llwindowcallbacks.h
@@ -69,6 +69,7 @@ public:
     virtual bool handleTimerEvent(LLWindow *window);
     virtual bool handleDeviceChange(LLWindow *window);
     virtual bool handleDPIChanged(LLWindow *window, F32 ui_scale_factor, S32 window_width, S32 window_height);
+    virtual bool handleDisplayChanged();
     virtual bool handleWindowDidChangeScreen(LLWindow *window);
 
     enum DragNDropAction {
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index bc39e7f6f7..557af1b158 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -81,10 +81,6 @@ const S32   BITS_PER_PIXEL = 32;
 const S32   MAX_NUM_RESOLUTIONS = 32;
 const F32   ICON_FLASH_TIME = 0.5f;
 
-#ifndef WM_DPICHANGED
-#define WM_DPICHANGED 0x02E0
-#endif
-
 #ifndef USER_DEFAULT_SCREEN_DPI
 #define USER_DEFAULT_SCREEN_DPI 96 // Win7
 #endif
@@ -2958,6 +2954,11 @@ LRESULT CALLBACK LLWindowWin32::mainWindowProc(HWND h_wnd, UINT u_msg, WPARAM w_
             return 0;
         }
 
+        case WM_DISPLAYCHANGE:
+        {
+            WINDOW_IMP_POST(window_imp->mCallbacks->handleDisplayChanged());
+        }
+
         case WM_SETFOCUS:
         {
             LL_PROFILE_ZONE_NAMED_CATEGORY_WIN32("mwp - WM_SETFOCUS");