diff --git a/include/boost/intrusive_ptr.hpp b/include/boost/intrusive_ptr.hpp
index 0a62544..36bc321 100644
--- a/include/boost/intrusive_ptr.hpp
+++ b/include/boost/intrusive_ptr.hpp
@@ -20,6 +20,7 @@
 #endif
 
 #include <functional> // std::less
+#include <boost/type_traits/ice.hpp>
 
 namespace boost
 {
diff --git a/include/boost/scoped_ptr.hpp b/include/boost/scoped_ptr.hpp
index 7adc0e8..77c77a5 100644
--- a/include/boost/scoped_ptr.hpp
+++ b/include/boost/scoped_ptr.hpp
@@ -14,6 +14,7 @@
 
 #include <boost/assert.hpp>
 #include <boost/checked_delete.hpp>
+#include <boost/type_traits/ice.hpp>
 
 #ifndef BOOST_NO_AUTO_PTR
 # include <memory>          // for std::auto_ptr