diff --git a/test/array.cpp b/test/array.cpp
index 9f61c4b26..e2b20f9e9 100644
--- a/test/array.cpp
+++ b/test/array.cpp
@@ -247,7 +247,7 @@ template<typename ArrayType> void array_real(const ArrayType& m)
   VERIFY_IS_APPROX(sinh(m1), 0.5*(exp(m1)-exp(-m1)));
   VERIFY_IS_APPROX(cosh(m1), 0.5*(exp(m1)+exp(-m1)));
   VERIFY_IS_APPROX(tanh(m1), (0.5*(exp(m1)-exp(-m1)))/(0.5*(exp(m1)+exp(-m1))));
-  VERIFY_IS_APPROX(arg(m1), ((ArrayType)(m1<0))*std::acos(-1.0));
+  VERIFY_IS_APPROX(arg(m1), ((m1<0).template cast<Scalar>())*std::acos(-1.0));
   VERIFY((round(m1) <= ceil(m1) && round(m1) >= floor(m1)).all());
   VERIFY((Eigen::isnan)((m1*0.0)/0.0).all());
   VERIFY((Eigen::isinf)(m4/0.0).all());