diff --git a/src/win32/win32iface.h b/src/win32/win32iface.h
index f8d119dcb..712c21a89 100644
--- a/src/win32/win32iface.h
+++ b/src/win32/win32iface.h
@@ -51,6 +51,9 @@
 
 EXTERN_CVAR (Bool, vid_vsync)
 
+class D3DTex;
+class D3DPal;
+
 class Win32Video : public IVideo
 {
  public: