configure: Check for xinpgen struct.
diff --git a/configure.ac b/configure.ac
index 8b78efe..b0725c1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1572,6 +1572,30 @@
 #include <signal.h>])
 AC_CHECK_TYPES([request_sense],,,[#include <linux/cdrom.h>])
 
+AC_CHECK_TYPES([struct xinpgen],,,
+[#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_SOCKETVAR_H
+#include <sys/socketvar.h>
+#endif
+#ifdef HAVE_NET_ROUTE_H
+#include <net/route.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_NETINET_IN_SYSTM_H
+#include <netinet/in_systm.h>
+#endif
+#ifdef HAVE_NETINET_IP_H
+#include <netinet/ip.h>
+#endif
+#ifdef HAVE_NETINET_IN_PCB_H
+#include <netinet/in_pcb.h>
+#endif])
+
 AC_CHECK_MEMBERS([struct ff_effect.direction],,,
 [#ifdef HAVE_LINUX_INPUT_H
 #include <linux/input.h>