diff --git a/test/main.h b/test/main.h
index 604685c26..1104adaa6 100644
--- a/test/main.h
+++ b/test/main.h
@@ -282,7 +282,7 @@ namespace Eigen
 
 namespace Eigen {
 
-template<typename T> inline typename NumTraits<T>::Real test_precision() { return T(0); }
+template<typename T> inline typename NumTraits<T>::Real test_precision() { return NumTraits<T>::dummy_precision(); }
 template<> inline float test_precision<float>() { return 1e-3f; }
 template<> inline double test_precision<double>() { return 1e-6; }
 template<> inline float test_precision<std::complex<float> >() { return test_precision<float>(); }