diff --git a/src/core/PieceTable.h b/src/core/PieceTable.h
index 4912e04..12127a4 100644
--- a/src/core/PieceTable.h
+++ b/src/core/PieceTable.h
@@ -58,14 +58,6 @@ public:
         uint32_t offset;
     };
 
-    struct ChangeDescriptor
-    {
-        uint32_t piece_descriptor_index;
-        uint32_t from_val;
-        uint32_t to_val;
-        uint8_t attr_idx;
-    };
-
     PieceTable(const uint8_t * file_buffer, unsigned long file_buffer_size);
 
     Piece * add_piece()
@@ -99,7 +91,6 @@ protected:
 
     PagedBuffer<uint8_t> m_append_buffer;
     PagedBuffer<Piece> m_pieces;
-    PagedBuffer<ChangeDescriptor> m_change_descriptors;
 };
 
 #endif