diff --git a/include/boost/gil/channel_algorithm.hpp b/include/boost/gil/channel_algorithm.hpp
index aa1c733e84..191f12de1e 100644
--- a/include/boost/gil/channel_algorithm.hpp
+++ b/include/boost/gil/channel_algorithm.hpp
@@ -124,7 +124,7 @@ struct unsigned_integral_num_bits<packed_channel_value<K>>
 
 template <typename SrcChannelV, typename DstChannelV>     // Model ChannelValueConcept
 struct channel_converter_unsigned
-    : public detail::channel_converter_unsigned_impl<SrcChannelV,DstChannelV,is_integral<SrcChannelV>::value,is_integral<DstChannelV>::value> {};
+    : public detail::channel_converter_unsigned_impl<SrcChannelV,DstChannelV,std::is_integral<SrcChannelV>::value,std::is_integral<DstChannelV>::value> {};
 
 
 /// \brief Converting a channel to itself - identity operation