diff --git a/payload_consumer/verity_writer_android.cc b/payload_consumer/verity_writer_android.cc
index 06d1489..d5437b6 100644
--- a/payload_consumer/verity_writer_android.cc
+++ b/payload_consumer/verity_writer_android.cc
@@ -41,6 +41,9 @@
 bool VerityWriterAndroid::Init(const InstallPlan::Partition& partition) {
   partition_ = &partition;
 
+  if (partition_->hash_tree_size != 0 || partition_->fec_size != 0) {
+    utils::SetBlockDeviceReadOnly(partition_->target_path, false);
+  }
   if (partition_->hash_tree_size != 0) {
     auto hash_function =
         HashTreeBuilder::HashFunction(partition_->hash_tree_algorithm);