diff --git a/conf/init.tangorpro.rc b/conf/init.tangorpro.rc
index b37e641..02c58ab 100644
--- a/conf/init.tangorpro.rc
+++ b/conf/init.tangorpro.rc
@@ -102,6 +102,7 @@ on post-fs-data
 # Audio
 on post-fs-data
     chmod 644 /mnt/vendor/persist/audio/speaker.cal
+    chmod 644 /mnt/vendor/persist/audio/speaker.diag
 
 # Thermal
 on property:vendor.thermal.link_ready=1