diff --git a/AssetStudio.Utility/ModelConverter.cs b/AssetStudio.Utility/ModelConverter.cs
index f9d820c..6700aed 100644
--- a/AssetStudio.Utility/ModelConverter.cs
+++ b/AssetStudio.Utility/ModelConverter.cs
@@ -381,6 +381,7 @@ namespace AssetStudio
                 {
                     if (iMesh.hasUV[uv])
                     {
+                        c = 4;
                         var m_UV = mesh.GetUV(uv);
                         if (m_UV.Length == mesh.m_VertexCount * 2)
                         {