diff --git a/src/gui/render/renderDX9.cpp b/src/gui/render/renderDX9.cpp
index ba061d498..29708d1fe 100644
--- a/src/gui/render/renderDX9.cpp
+++ b/src/gui/render/renderDX9.cpp
@@ -131,6 +131,9 @@ void FurnaceGUIRenderDX9::resized(const SDL_Event& ev) {
     logE("OH NO");
   }
   ImGui_ImplDX9_CreateDeviceObjects();
+
+  outW=ev.window.data1;
+  outH=ev.window.data2;
 }
 
 void FurnaceGUIRenderDX9::clear(ImVec4 color) {
@@ -262,6 +265,8 @@ bool FurnaceGUIRenderDX9::init(SDL_Window* win, int swapInt) {
     maxHeight=caps.MaxTextureHeight;
   }
 
+  SDL_GetWindowSize(win,&outW,&outH);
+
   return true;
 }