diff --git a/include/boost/integer/common_factor_rt.hpp b/include/boost/integer/common_factor_rt.hpp
index 7ecedd8..a4f44d4 100644
--- a/include/boost/integer/common_factor_rt.hpp
+++ b/include/boost/integer/common_factor_rt.hpp
@@ -98,7 +98,7 @@ namespace boost {
          inline static T BOOST_CXX14_CONSTEXPR abs(const T& val) BOOST_GCD_NOEXCEPT(T)
          {
             // This sucks, but std::abs is not constexpr :(
-            return val < 0 ? -val : val;
+            return val < T(0) ? -val : val;
          }
       };