diff --git a/UBigInt.pas b/UBigInt.pas
index 6ee26d8..56e48f9 100644
--- a/UBigInt.pas
+++ b/UBigInt.pas
@@ -73,6 +73,8 @@ type
     class function FromInt64(const AValue: Int64): TBigInt; static;
   end;
 
+  { Operators }
+
   operator := (const A: Int64): TBigInt;
   operator - (const A: TBigInt): TBigInt;
   operator + (const A, B: TBigInt): TBigInt;
@@ -80,6 +82,7 @@ type
   operator * (const A, B: TBigInt): TBigInt;
   operator shl (const A: TBigInt; const B: Integer): TBigInt;
   operator = (const A, B: TBigInt): Boolean;
+  operator <> (const A, B: TBigInt): Boolean;
 
 implementation
 
@@ -388,6 +391,8 @@ begin
   end;
 end;
 
+{ Operators }
+
 operator := (const A: Int64): TBigInt;
 begin
   Result := TBigInt.FromInt64(A);
@@ -427,6 +432,7 @@ begin
     Result := TBigInt.MultiplyAbsoluteValues(A, B, A.IsNegative <> B.IsNegative);
 end;
 
+// TODO: Shift operator could be implemented with a single Move call, but I do not want to change it without test cases.
 operator shl(const A: TBigInt; const B: Integer): TBigInt;
 var
   i, j, digitShifts, bitShifts, reverseShift, len, newLength: Integer;
@@ -481,5 +487,10 @@ begin
   Result := A.CompareTo(B) = 0;
 end;
 
+operator <> (const A, B: TBigInt): Boolean;
+begin
+  Result := A.CompareTo(B) <> 0;
+end;
+
 end.