diff --git a/dix/Xserver.d b/dix/Xserver.d
index f4f229d84..4a233e1f6 100644
--- a/dix/Xserver.d
+++ b/dix/Xserver.d
@@ -27,6 +27,8 @@
 #define string char *
 #define pid_t uint32_t
 #define zoneid_t uint32_t
+#elif defined(__FreeBSD__)
+#define zoneid_t id_t
 #else
 #include <sys/types.h>
 #endif