diff --git a/BUILDING.txt b/BUILDING.txt
index 5277fb2..f43680d 100644
--- a/BUILDING.txt
+++ b/BUILDING.txt
@@ -115,6 +115,7 @@
 $ patch -p1 < fltk-1.3.x-clipboard-win32-fix.patch
 $ patch -p1 < fltk-1.3.x-clipboard-win32.patch
 $ patch -p1 < fltk-1.3.x-clipboard-osx.patch
+$ patch -p1 < fltk-xfixes-xcursor-cmake.patch
 
 Ability to convert a Fl_Pixmap to a Fl_RGB_Image
 http://www.fltk.org/str.php?L2659