diff --git a/src/nghelp.c b/src/nghelp.c
index ed01281d5..f281b79a5 100644
--- a/src/nghelp.c
+++ b/src/nghelp.c
@@ -36,8 +36,17 @@ char *hlp_filelist[] = { "ngspice", 0 };
 
 extern void ivars();
 
+#ifdef HAS_WINDOWS
+bool oflag = FALSE;         /* Output over redefined I/O functions */
+FILE *flogp;  /* hvogt 15.12.2001 */
+#endif /* HAS_WINDOWS */
+
 int
+#ifdef HAS_WINDOWS
+xmain(int ac, char **av)
+#else
 main(int ac, char **av)
+#endif /* HAS_WINDOWS */
 {
     wordlist *wl = NULL;