diff --git a/code/ObjFileImporter.cpp b/code/ObjFileImporter.cpp
index 93d48ba16..0cb1b6544 100644
--- a/code/ObjFileImporter.cpp
+++ b/code/ObjFileImporter.cpp
@@ -251,7 +251,7 @@ void ObjFileImporter::CreateDataFromImport(const ObjFile::Model* pModel, aiScene
 
 		std::unique_ptr<aiMesh> mesh( new aiMesh );
         mesh->mPrimitiveTypes = aiPrimitiveType_POINT;
-        unsigned int n = pModel->m_Vertices.size();
+        unsigned int n = (unsigned int)pModel->m_Vertices.size();
         mesh->mNumVertices = n;
 
         mesh->mVertices = new aiVector3D[n];