diff --git a/optimize.c b/optimize.c
index b147cf4..46dffec 100644
--- a/optimize.c
+++ b/optimize.c
@@ -29,6 +29,20 @@ static const char rcsid[] _U_ =
 #include "config.h"
 #endif
 
+#ifdef WIN32
+#include <pcap-stdinc.h>
+#else /* WIN32 */
+#if HAVE_INTTYPES_H
+#include <inttypes.h>
+#elif HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#ifdef HAVE_SYS_BITYPES_H
+#include <sys/bitypes.h>
+#endif
+#include <sys/types.h>
+#endif /* WIN32 */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <memory.h>