1 files changed, 6 insertions, 0 deletions
diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index e45fd75b3a1..6f3c799c937 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -56,6 +56,12 @@ int scan_file ();
 int scan_lisp_file ();
 int scan_c_file ();
 
+#ifdef MSDOS
+/* s/msdos.h defines this as sys_chdir, but we're not linking with the
+   file where that function is defined.  */
+#undef chdir
+#endif
+
 /* Stdio stream for output to the DOC file.  */
 FILE *outfile;