diff --git a/configure.ac b/configure.ac
index 3c117d3fd..5f9879865 100644
--- a/configure.ac
+++ b/configure.ac
@@ -756,7 +756,7 @@ AC_CHECK_HEADERS([assert.h crt_externs.h])
 #   utimensat: posix.1-2008
 #   sched_getaffinity, sched_setaffinity: GNU extensions (glibc)
 #
-AC_CHECK_FUNCS([DINFINITY DQNAN cexp chsize clog clog10 ctermid fesetround ftime ftruncate fchown getcwd geteuid getsid gettimeofday gmtime_r ioctl lstat mkdir mknod nice pipe _pipe poll readdir_r readdir64_r readlink rename rmdir select setegid seteuid setlocale setpgid setsid sigaction siginterrupt stat64 strftime strptime symlink sync sysconf tcgetpgrp tcsetpgrp times uname waitpid strdup system usleep atexit on_exit chown link fcntl ttyname getpwent getgrent kill getppid getpgrp fork setitimer getitimer strchr strcmp index bcopy memcpy rindex truncate unsetenv isblank _NSGetEnviron strcoll strcoll_l newlocale utimensat sched_getaffinity sched_setaffinity])
+AC_CHECK_FUNCS([DINFINITY DQNAN cexp chsize clog clog10 ctermid fesetround ftime ftruncate fchown fchmod getcwd geteuid getsid gettimeofday gmtime_r ioctl lstat mkdir mknod nice pipe _pipe poll readdir_r readdir64_r readlink rename rmdir select setegid seteuid setlocale setpgid setsid sigaction siginterrupt stat64 strftime strptime symlink sync sysconf tcgetpgrp tcsetpgrp times uname waitpid strdup system usleep atexit on_exit chown link fcntl ttyname getpwent getgrent kill getppid getpgrp fork setitimer getitimer strchr strcmp index bcopy memcpy rindex truncate unsetenv isblank _NSGetEnviron strcoll strcoll_l newlocale utimensat sched_getaffinity sched_setaffinity])
 
 # Reasons for testing:
 #   netdb.h - not in mingw
diff --git a/libguile/filesys.c b/libguile/filesys.c
index cdd9ae73c..9c39307b6 100644
--- a/libguile/filesys.c
+++ b/libguile/filesys.c
@@ -104,7 +104,6 @@
 /* Some more definitions for the native Windows port. */
 #ifdef __MINGW32__
 # define fsync(fd) _commit (fd)
-# define fchmod(fd, mode) (-1)
 #endif /* __MINGW32__ */
 
 
@@ -1335,12 +1334,13 @@ SCM_DEFINE (scm_chmod, "chmod", 2, 0, 0,
 #define FUNC_NAME s_scm_chmod
 {
   int rv;
-  int fdes;
 
   object = SCM_COERCE_OUTPORT (object);
 
+#if HAVE_FCHMOD
   if (scm_is_integer (object) || SCM_OPFPORTP (object))
     {
+      int fdes;
       if (scm_is_integer (object))
 	fdes = scm_to_int (object);
       else
@@ -1348,6 +1348,7 @@ SCM_DEFINE (scm_chmod, "chmod", 2, 0, 0,
       SCM_SYSCALL (rv = fchmod (fdes, scm_to_int (mode)));
     }
   else
+#endif
     {
       STRING_SYSCALL (object, c_object,
 		      rv = chmod (c_object, scm_to_int (mode)));