diff --git a/libvncserver/rfbcrypto.h b/libvncserver/rfbcrypto.h
index 9c9e4e0..fec095e 100644
--- a/libvncserver/rfbcrypto.h
+++ b/libvncserver/rfbcrypto.h
@@ -3,12 +3,12 @@
 
 #include "rfb/rfbconfig.h"
 
-#ifdef LIBVNCSERVER_HAVE_SYS_UIO_H
-#include <sys/uio.h>
-
 #define SHA1_HASH_SIZE 20
 #define MD5_HASH_SIZE 16
 
+#ifdef LIBVNCSERVER_HAVE_SYS_UIO_H
+#include <sys/uio.h>
+
 void digestmd5(const struct iovec *iov, int iovcnt, void *dest);
 void digestsha1(const struct iovec *iov, int iovcnt, void *dest);
 #endif