diff --git a/plat_private/property_contexts b/plat_private/property_contexts
index 2da3ae3..56e983f 100644
--- a/plat_private/property_contexts
+++ b/plat_private/property_contexts
@@ -3,3 +3,6 @@ ctl.mdlogger u:object_r:ctl_mdlogger_prop:s0
 ctl.emdlogger1       u:object_r:ctl_emdlogger1_prop:s0
 ctl.emdlogger2       u:object_r:ctl_emdlogger2_prop:s0
 ctl.emdlogger3       u:object_r:ctl_emdlogger3_prop:s0
+
+#allow mtk audio hidl service to read "ro.audio.usb.period_us"
+ro.audio.usb.period_us u:object_r:exported_default_prop:s0 exact int