diff --git a/Pinta.Core/ImageFormats/GdkPixbufFormat.cs b/Pinta.Core/ImageFormats/GdkPixbufFormat.cs
index aa34290ea..3505435b1 100644
--- a/Pinta.Core/ImageFormats/GdkPixbufFormat.cs
+++ b/Pinta.Core/ImageFormats/GdkPixbufFormat.cs
@@ -102,8 +102,7 @@ protected virtual void DoSave (Pixbuf pb, GLib.IFile file, string fileType, Gtk.
 		{
 			using var stream = file.Replace ();
 			try {
-				// TODO-GTK4: the simpler SaveToStream() seems to be missing in GtkSharp.
-				pb.SaveToStreamv (stream, fileType, null, null, null);
+				pb.SaveToStream (stream, fileType, null);
 			} finally {
 				stream.Close (null);
 			}
diff --git a/Pinta.Core/ImageFormats/JpegFormat.cs b/Pinta.Core/ImageFormats/JpegFormat.cs
index 83aef9eb0..ac3de9e5d 100644
--- a/Pinta.Core/ImageFormats/JpegFormat.cs
+++ b/Pinta.Core/ImageFormats/JpegFormat.cs
@@ -66,9 +66,7 @@ protected override void DoSave (Pixbuf pb, GLib.IFile file, string fileType, Gtk
 
 			using var stream = file.Replace ();
 			try {
-				// FIXME - SaveToStreamv() isn't wrapped correctly by GtkSharp, so the quality setting is skipped for now...
-				pb.SaveToStreamv (stream, fileType, null, null, null);
-				//pb.SavevUtf8 (fileName, fileType, new string?[] { "quality", null }, new string?[] { level.ToString (), null });
+                pb.SaveToStreamv (stream, fileType, new string?[] { "quality", null }, new string?[] { level.ToString (), null }, null);
 			} finally {
 				stream.Close (null);
 			}