#include <sys/queue.h>
#include <sys/param.h>
#include <sys/select.h>
+#if defined(__linux__)
+#include "tree.h"
+#elif defined(__OpenBSD__)
#include <sys/tree.h>
+#elif defined(__FreeBSD__)
+#include <sys/tree.h>
+#else
+#include <sys/tree.h>
+#endif
#include <X11/cursorfont.h>
#include <X11/keysym.h>