diff --git a/include/boost/phoenix/core/environment.hpp b/include/boost/phoenix/core/environment.hpp
index a5e7922..1f30030 100644
--- a/include/boost/phoenix/core/environment.hpp
+++ b/include/boost/phoenix/core/environment.hpp
@@ -12,7 +12,6 @@
 #include <boost/fusion/sequence/intrinsic/at.hpp>
 #include <boost/fusion/support/is_sequence.hpp>
 #include <boost/proto/transform/impl.hpp>
-#include <boost/proto/functional/fusion/at.hpp>
 #include <boost/utility/enable_if.hpp>
 #include <boost/utility/result_of.hpp>
 
diff --git a/include/boost/phoenix/core/terminal.hpp b/include/boost/phoenix/core/terminal.hpp
index 81d5ecf..2bf15ed 100644
--- a/include/boost/phoenix/core/terminal.hpp
+++ b/include/boost/phoenix/core/terminal.hpp
@@ -12,6 +12,7 @@
 #include <boost/is_placeholder.hpp>
 #include <boost/phoenix/core/meta_grammar.hpp>
 #include <boost/proto/transform/lazy.hpp>
+#include <boost/proto/functional/fusion/at.hpp>
 
 namespace boost { namespace phoenix
 {