diff --git a/public/sgdisk.te b/public/sgdisk.te
index 9d71249..e5a9152 100644
--- a/public/sgdisk.te
+++ b/public/sgdisk.te
@@ -17,6 +17,8 @@
 allowxperm sgdisk vold_device:blk_file ioctl { BLKGETSIZE };
 # Force a re-read of the partition table.
 allowxperm sgdisk vold_device:blk_file ioctl { BLKRRPART };
+# Allow reading of the physical block size.
+allowxperm sgdisk vold_device:blk_file ioctl { BLKPBSZGET };
 
 # Inherit and use pty created by android_fork_execvp()
 allow sgdisk devpts:chr_file { read write ioctl getattr };