diff --git a/src/ViewModels/CommitDetail.cs b/src/ViewModels/CommitDetail.cs
index 14ccc77b..759b2741 100644
--- a/src/ViewModels/CommitDetail.cs
+++ b/src/ViewModels/CommitDetail.cs
@@ -354,7 +354,7 @@ namespace SourceGit.ViewModels
 
             Task.Run(async () =>
             {
-                var parent = _commit.Parents.Count == 0 ? Models.Commit.EmptyTreeSHA1 : _commit.Parents[0];
+                var parent = _commit.Parents.Count == 0 ? Models.Commit.EmptyTreeSHA1 : $"{_commit.SHA}^";
                 var cmd = new Commands.CompareRevisions(_repo.FullPath, parent, _commit.SHA) { CancellationToken = token };
                 var changes = await cmd.ReadAsync().ConfigureAwait(false);
                 var visible = changes;