diff --git a/common/fltk/FL/win32.H b/common/fltk/FL/win32.H
index 2c68266..9297e9f 100644
--- a/common/fltk/FL/win32.H
+++ b/common/fltk/FL/win32.H
@@ -82,6 +82,7 @@
   int wait_for_expose;
   HDC private_dc; // used for OpenGL
   HCURSOR cursor;
+  int custom_cursor;
   HDC saved_hdc;  // saves the handle of the DC currently loaded
   // static variables, static functions and member functions
   static Fl_X* first;