Probably need sys/time.h here too to be safe.

src/include/commands/vacuum.h

@@ -7,13 +7,15 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/commands/vacuum.h,v 1.52 2004/05/21 05:08:04 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/commands/vacuum.h,v 1.53 2004/05/21 16:22:38 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
 #ifndef VACUUM_H
 #define VACUUM_H
 
+#include <sys/time.h>
+
 #ifdef HAVE_GETRUSAGE
 #include <sys/resource.h>
 #else