diff --git xedit-clean/lisp/mathimp.c xedit-workdir/lisp/mathimp.c
index 0433968..3734efb 100644
--- xedit-clean/lisp/mathimp.c
+++ xedit-workdir/lisp/mathimp.c
@@ -29,6 +29,7 @@
 
 /* $XFree86: xc/programs/xedit/lisp/mathimp.c,v 1.14tsi Exp $ */
 
+int finite(double);
 
 /*
  * Defines
diff --git xedit-clean/lisp/mp/mpi.c xedit-workdir/lisp/mp/mpi.c
index 7fcc30e..6984f09 100644
--- xedit-clean/lisp/mp/mpi.c
+++ xedit-workdir/lisp/mp/mpi.c
@@ -29,6 +29,8 @@
 
 /* $XFree86: xc/programs/xedit/lisp/mp/mpi.c,v 1.12 2002/11/20 07:44:43 paulo Exp $ */
 
+int finite(double);
+
 #include "mp.h"
 
 #if defined(__UNIXOS2__) || defined(__APPLE__)
diff --git xedit-clean/lisp/read.c xedit-workdir/lisp/read.c
index 4103736..8898b1b 100644
--- xedit-clean/lisp/read.c
+++ xedit-workdir/lisp/read.c
@@ -29,6 +29,8 @@
 
 /* $XFree86: xc/programs/xedit/lisp/read.c,v 1.36tsi Exp $ */
 
+int finite(double);
+
 #include <errno.h>
 #include "lisp/read.h"
 #include "lisp/package.h"