diff --git a/AssetStudioUtility/ModelConverter.cs b/AssetStudioUtility/ModelConverter.cs
index 839b097..6dce124 100644
--- a/AssetStudioUtility/ModelConverter.cs
+++ b/AssetStudioUtility/ModelConverter.cs
@@ -366,6 +366,7 @@ namespace AssetStudio
                 {
                     if (iMesh.hasUV[uv])
                     {
+                        c = 4;
                         var m_UV = mesh.GetUV(uv);
                         if (m_UV.Length == mesh.m_VertexCount * 2)
                         {