diff --git a/package/network/config/wifi-scripts/files-ucode/usr/share/schema/wireless.wifi-iface.json b/package/network/config/wifi-scripts/files-ucode/usr/share/schema/wireless.wifi-iface.json
index c246c8fa4f..f5507305bd 100644
--- a/package/network/config/wifi-scripts/files-ucode/usr/share/schema/wireless.wifi-iface.json
+++ b/package/network/config/wifi-scripts/files-ucode/usr/share/schema/wireless.wifi-iface.json
@@ -605,11 +605,8 @@
 			"type": "boolean"
 		},
 		"mcast_rate": {
-			"description": "Allowed multicast rates",
-			"type": "array",
-			"items": {
-				"type": "number"
-			}
+			"description": "Allowed multicast rate",
+			"type": "number"
 		},
 		"mesh_auto_open_plinks": {
 			"type": "boolean"