diff --git a/src/modules/Gmp/gmp_machine.h.in b/src/modules/Gmp/gmp_machine.h.in
index 0bdc06a68ba80350019032ebee4c00b1a4a8e432..90f1cb0527b18cb7c1d1fd6d37448cf8882d8197 100644
--- a/src/modules/Gmp/gmp_machine.h.in
+++ b/src/modules/Gmp/gmp_machine.h.in
@@ -1,7 +1,13 @@
-/* $Id: gmp_machine.h.in,v 1.2 1998/03/28 14:51:57 grubba Exp $ */
+/* $Id: gmp_machine.h.in,v 1.3 1998/07/11 15:58:21 grubba Exp $ */
 #ifndef GMP_MACHINE_H
 #define GMP_MACHINE_H
 
+/* Define this if you have <gmp2/gmp.h> */
+#undef HAVE_GMP2_GMP_H
+
+/* Define this if you have -lgmp2 */
+#undef HAVE_LIBGMP2
+
 /* Define this if you have <gmp.h> */
 #undef HAVE_GMP_H