diff --git a/AssetStudioUtility/ModelConverter.cs b/AssetStudioUtility/ModelConverter.cs
index dd52764..449825c 100644
--- a/AssetStudioUtility/ModelConverter.cs
+++ b/AssetStudioUtility/ModelConverter.cs
@@ -360,7 +360,7 @@ namespace AssetStudio
                     if (mesh.m_Tangents != null && mesh.m_Tangents.Length == mesh.m_VertexCount * 4)
                     {
                         iMesh.hasTangent = true;
-                        iVertex.Tangent = new Vector4(-mesh.m_Tangents[j * 4], mesh.m_Tangents[j * 4 + 1], mesh.m_Tangents[j * 4 + 2], -mesh.m_Tangents[j * 4 + 3]);
+                        iVertex.Tangent = new Vector4(-mesh.m_Tangents[j * 4], mesh.m_Tangents[j * 4 + 1], mesh.m_Tangents[j * 4 + 2], mesh.m_Tangents[j * 4 + 3]);
                     }
                     //BoneInfluence
                     if (mesh.m_Skin?.Length > 0)