--- include/sudo_util.h.orig	2015-07-17 07:49:35.184634311 +0200
+++ include/sudo_util.h	2015-07-17 07:50:05.018046508 +0200
@@ -23,6 +23,10 @@
 # include "compat/stdbool.h"
 #endif /* HAVE_STDBOOL_H */
 
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>	/* id_t */
+#endif
+
 /*
  * Macros for operating on struct timeval.
  */