diff --git a/include/boost/multiprecision/tommath.hpp b/include/boost/multiprecision/tommath.hpp
index 65fb667a..9c373443 100644
--- a/include/boost/multiprecision/tommath.hpp
+++ b/include/boost/multiprecision/tommath.hpp
@@ -640,7 +640,6 @@ inline typename enable_if<is_unsigned<Integer>, Integer>::type eval_integer_modu
 template <class Integer>
 inline typename enable_if<is_signed<Integer>, Integer>::type eval_integer_modulus(const tommath_int& x, Integer val)
 {
-   typedef typename make_unsigned<Integer>::type unsigned_type;
    return eval_integer_modulus(x, boost::multiprecision::detail::unsigned_abs(val));
 }