diff --git a/NHSE.WinForms/Subforms/FieldItemEditor.cs b/NHSE.WinForms/Subforms/FieldItemEditor.cs
index 53a8458..af67859 100644
--- a/NHSE.WinForms/Subforms/FieldItemEditor.cs
+++ b/NHSE.WinForms/Subforms/FieldItemEditor.cs
@@ -295,7 +295,7 @@ private void B_ImportAllAcres_Click(object sender, EventArgs e)
             var path = ofd.FileName;
             var fi = new FileInfo(path);
 
-            int expect = layer.AcreTileCount * FieldItem.SIZE;
+            int expect = layer.MapTileCount * FieldItem.SIZE;
             if (fi.Length != expect)
             {
                 WinFormsUtil.Error($"Expected size (0x{expect:X}) != Input size (0x{fi.Length:X}", path);
diff --git a/NHSE.WinForms/Subforms/TerrainEditor.cs b/NHSE.WinForms/Subforms/TerrainEditor.cs
index fa9ef7b..be44be6 100644
--- a/NHSE.WinForms/Subforms/TerrainEditor.cs
+++ b/NHSE.WinForms/Subforms/TerrainEditor.cs
@@ -292,7 +292,7 @@ private void B_ImportAllAcres_Click(object sender, EventArgs e)
             var path = ofd.FileName;
             var fi = new FileInfo(path);
 
-            int expect = Terrain.AcreTileCount * TerrainTile.SIZE;
+            int expect = Terrain.MapTileCount * TerrainTile.SIZE;
             if (fi.Length != expect)
             {
                 WinFormsUtil.Error($"Expected size (0x{expect:X}) != Input size (0x{fi.Length:X}", path);