diff --git a/failtest/sparse_ref_5.cpp b/failtest/sparse_ref_5.cpp
new file mode 100644
index 0000000..4478f6f
--- /dev/null
+++ b/failtest/sparse_ref_5.cpp
@@ -0,0 +1,16 @@
+#include "../Eigen/Sparse"
+
+using namespace Eigen;
+
+void call_ref(Ref<SparseMatrix<float> > a) { }
+
+int main()
+{
+  SparseMatrix<float> a(10,10);
+  SparseMatrixBase<SparseMatrix<float> > &ac(a);
+#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
+  call_ref(ac);
+#else
+  call_ref(ac.derived());
+#endif
+}