diff --git a/docs/user/supported_devices.rst b/docs/user/supported_devices.rst
index 3cab0469..ea5e5ea6 100644
--- a/docs/user/supported_devices.rst
+++ b/docs/user/supported_devices.rst
@@ -251,6 +251,10 @@ mpc85xx-p1020
 ramips-mt7620
 -------------
 
+* ASUS
+
+  - RT-AC51U
+
 * GL.iNet
 
   - GL-MT300A
diff --git a/package/gluon-core/luasrc/lib/gluon/upgrade/010-primary-mac b/package/gluon-core/luasrc/lib/gluon/upgrade/010-primary-mac
index 58c0fc06..8e9623ec 100755
--- a/package/gluon-core/luasrc/lib/gluon/upgrade/010-primary-mac
+++ b/package/gluon-core/luasrc/lib/gluon/upgrade/010-primary-mac
@@ -117,6 +117,7 @@ local primary_addrs = {
 		}},
 		{'ramips', 'mt7620', {
 			'xiaomi,miwifi-mini',
+			'asus,rt-ac51u',
 		}},
 	}},
 	{phy(1), {
diff --git a/targets/ramips-mt7620 b/targets/ramips-mt7620
index 347df37c..fbf57ba8 100644
--- a/targets/ramips-mt7620
+++ b/targets/ramips-mt7620
@@ -2,7 +2,6 @@
 
 device('asus-rt-ac51u', 'asus_rt-ac51u', {
 	factory = false,
-	broken = true, -- no 5GHz usable, LEDs not fully supported
 })