diff --git a/vndk.rc b/vndk.rc
index d7cc703..70b31e5 100644
--- a/vndk.rc
+++ b/vndk.rc
@@ -73,3 +73,6 @@ on property:persist.sys.phh.restart_ril=true
     restart vendor.qcrild
     restart vendor.qcrild2
     restart vendor.ril-daemon-mtk
+
+on property:vendor.debug.sf.latch_unsignaled=1
+    setprop debug.sf.latch_unsignaled 1