--- ffcall/callback/trampoline_r/trampoline_r.h.in
+++ ffcall/callback/trampoline_r/trampoline_r.h.in	2003-12-10 22:04:30.000000000 -0800
@@ -31,4 +31,9 @@
 extern void* trampoline_r_data1 ();
 #endif
 
+/* http://article.gmane.org/gmane.lisp.clisp.general/7485 */
+#ifndef MAP_VARIABLE
+# define MAP_VARIABLE 0
+#endif
+
 #endif /* _TRAMPOLINE_R_H */