diff --git a/doc/examples/make_circulant.cpp.main b/doc/examples/make_circulant.cpp.main
new file mode 100644
index 0000000..877f97f
--- /dev/null
+++ b/doc/examples/make_circulant.cpp.main
@@ -0,0 +1,8 @@
+int main()
+{
+  Eigen::VectorXd vec(4);
+  vec << 1, 2, 4, 8;
+  Eigen::MatrixXd mat;
+  mat = makeCirculant(vec);
+  std::cout << mat << std::endl;
+}