diff -Nur x11vnc.orig/configure.ac x11vnc/configure.ac
--- x11vnc.orig/configure.ac	2004-11-16 17:39:24.860061978 +0100
+++ x11vnc/configure.ac	2004-11-16 17:39:39.745018698 +0100
@@ -14,6 +14,10 @@
 AC_PROG_MAKE_SET
 AC_PROG_RANLIB
 
+# Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdlib.h string.h sys/socket.h sys/time.h sys/timeb.h syslog.h unistd.h])
+
 # Options
 AH_TEMPLATE(BACKCHANNEL, [Enable BackChannel communication])
 AC_ARG_WITH(backchannel,
@@ -108,7 +112,3 @@
 AC_SUBST(SDL_LIBS)
-
-# Checks for header files.
-AC_HEADER_STDC
-AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdlib.h string.h sys/socket.h sys/time.h sys/timeb.h syslog.h unistd.h])
 
 # Checks for typedefs, structures, and compiler characteristics.