diff --git a/sys/dts/freebsd-compatible.dts b/sys/dts/freebsd-compatible.dts
index c81f963c7872..b784a75b9f73 100644
--- a/sys/dts/freebsd-compatible.dts
+++ b/sys/dts/freebsd-compatible.dts
@@ -1,3 +1,3 @@
 / {
-	freebsd,dts-version = "6.4";
+	freebsd,dts-version = "6.6";
 };