diff --git a/src/system.h.in b/src/system.h.in
index 8264e2d..49a7616 100644
--- a/src/system.h.in
+++ b/src/system.h.in
@@ -37,6 +37,11 @@
 #define NEED_GETOPT
 #endif
 
+#cmakedefine HAVE_SYS_TYPES_H
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
 #ifdef WINSOCK
 #ifndef FD_SETSIZE
 #define FD_SETSIZE 4096
@@ -44,7 +49,6 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #else
-#include <sys/types.h>
 #include <sys/time.h>
 #include <arpa/inet.h>
 #include <netdb.h>
@@ -68,10 +72,6 @@
 #include <string.h>
 #include <time.h>
 
-#cmakedefine HAVE_SYS_TYPES_H
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
 #if !defined(WIN32)
 #include <inttypes.h>
 #include <unistd.h>