diff --git a/src/core/PieceTable.h b/src/core/PieceTable.h
index 4e2acf8..ae98c65 100644
--- a/src/core/PieceTable.h
+++ b/src/core/PieceTable.h
@@ -126,7 +126,6 @@ public:
     struct Change
     {
         Piece * links[2][2][2];
-        bool insert;
     };
 
     Piece * start_piece;