--- OLD/xc/programs/xclock/xclock.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/programs/xclock/xclock.c	Thu Jan  1 00:00:00 1970
@@ -24,6 +24,7 @@
 in this Software without prior written authorization from The Open Group.
  */
 
+#include <stdio.h>
 #include <X11/Xatom.h>
 #include <X11/Intrinsic.h>
 #include <X11/StringDefs.h>
@@ -118,7 +119,7 @@
     token->save_success = True;
 }
 
-void main(argc, argv)
+int main(argc, argv)
     int argc;
     char **argv;
 {