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-rw-r--r--boost/math/special_functions/expm1.hpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/boost/math/special_functions/expm1.hpp b/boost/math/special_functions/expm1.hpp
index 7423dc5c81..9cecc89756 100644
--- a/boost/math/special_functions/expm1.hpp
+++ b/boost/math/special_functions/expm1.hpp
@@ -107,6 +107,10 @@ T expm1_imp(T x, const mpl::int_<0>&, const Policy& pol)
BOOST_MATH_STD_USING
T a = fabs(x);
+ if((boost::math::isnan)(a))
+ {
+ return policies::raise_domain_error<T>("boost::math::expm1<%1%>(%1%)", "expm1 requires a finite argument, but got %1%", a, pol);
+ }
if(a > T(0.5f))
{
if(a >= tools::log_max_value<T>())