diff --git a/boot_control_android.h b/boot_control_android.h
index d6590fb..aa62e42 100644
--- a/boot_control_android.h
+++ b/boot_control_android.h
@@ -82,6 +82,10 @@
                           Slot slot,
                           const std::string& partition_name_suffix) const;
 
+  // Whether the target partitions should be loaded as dynamic partitions. Set
+  // by InitPartitionMetadata() per each update.
+  bool is_target_dynamic_{false};
+
   DISALLOW_COPY_AND_ASSIGN(BootControlAndroid);
 };