diff --git a/include/boost/gil/channel_algorithm.hpp b/include/boost/gil/channel_algorithm.hpp
index 1361219..957dd52 100644
--- a/include/boost/gil/channel_algorithm.hpp
+++ b/include/boost/gil/channel_algorithm.hpp
@@ -51,7 +51,7 @@ template <typename SrcChannelV, typename DstChannelV, bool SrcLessThanDst, bool
 
 
 template <typename UnsignedIntegralChannel>
-struct unsigned_integral_max_value : public mpl::integral_c<UnsignedIntegralChannel,-1> {};
+struct unsigned_integral_max_value : public mpl::integral_c<UnsignedIntegralChannel,static_cast<UnsignedIntegralChannel>(-1)> {};
 
 template <>
 struct unsigned_integral_max_value<uint8_t> : public mpl::integral_c<uint32_t,0xFF> {};