--- GL_Lsystem/Makefile.orig	Wed Aug 16 08:08:27 2000
+++ GL_Lsystem/Makefile	Tue Jan 22 00:58:31 2002
@@ -2,6 +2,8 @@
 
 .PHONY : clean all
 
+CFLAGS+= -I${X11BASE}/include
+
 all          : GLGraphics.o GL_Lsystem.o trackball.o Lstring Lturtle
 
 GLGraphics.o : GLGraphics.cpp  GLGraphics.h ../Extras/vect3.h ../Lsystem/UIBaseClass.h
