diff --git a/src/core/PieceTable.h b/src/core/PieceTable.h
index 78705c3..d00de07 100644
--- a/src/core/PieceTable.h
+++ b/src/core/PieceTable.h
@@ -78,6 +78,16 @@ public:
         {
             return valid() && (offset < piece->length);
         }
+
+        bool operator==(const Iterator & other) const
+        {
+            return (other.piece == piece) && (other.offset == offset);
+        }
+
+        bool operator!=(const Iterator & other) const
+        {
+            return !(*this == other);
+        }
     };
 
     struct Cursor
@@ -110,10 +120,14 @@ public:
         bool check_go_left(int n);
         bool check_go_right(int n, bool allow_on_eol);
 
-        bool operator==(const Cursor & c)
+        bool operator==(const Cursor & c) const
         {
             return (c.line == line) && (c.column == column);
         }
+        bool operator!=(const Cursor & c) const
+        {
+            return !(*this == c);
+        }
         void warp_to_inserted_piece(Piece * piece);
 
     protected: