diff --git a/UVtools.Core/Layers/Layer.cs b/UVtools.Core/Layers/Layer.cs
index 7b99a52..e2dba00 100644
--- a/UVtools.Core/Layers/Layer.cs
+++ b/UVtools.Core/Layers/Layer.cs
@@ -887,7 +887,7 @@ public class Layer : BindableBase, IEquatable<Layer>, IEquatable<uint>
             {
                 CompressedBytes = CompressMat(value, _compressionCodec);
                 _resolutionX = (uint)value.Width;
-                _resolutionX = (uint)value.Height;
+                _resolutionY = (uint)value.Height;
             }
             else
             {