diff --git a/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h b/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h
index 0457986..3655c01 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/mock_snapshot_writer.h
@@ -36,6 +36,8 @@
 
     MOCK_METHOD(bool, EmitCopy, (uint64_t, uint64_t), (override));
     MOCK_METHOD(bool, EmitRawBlocks, (uint64_t, const void*, size_t), (override));
+    MOCK_METHOD(bool, EmitXorBlocks, (uint32_t, const void*, size_t, uint32_t, uint16_t),
+                (override));
     MOCK_METHOD(bool, EmitZeroBlocks, (uint64_t, uint64_t), (override));
     MOCK_METHOD(bool, EmitLabel, (uint64_t), (override));
     MOCK_METHOD(bool, EmitSequenceData, (size_t, const uint32_t*), (override));