diff --git a/DiffPlex/Differ.cs b/DiffPlex/Differ.cs
index 64acfab0..585127d4 100644
--- a/DiffPlex/Differ.cs
+++ b/DiffPlex/Differ.cs
@@ -341,9 +341,9 @@ private static void BuildPieceHashes(IDictionary<string, int> pieceHash, Modific
                 string piece = pieces[i];
                 if (ignoreWhitespace) piece = piece.Trim();
 
-                if (pieceHash.ContainsKey(piece))
+                if (pieceHash.TryGetValue(piece, out var value))
                 {
-                    data.HashedPieces[i] = pieceHash[piece];
+                    data.HashedPieces[i] = value;
                 }
                 else
                 {