diff --git a/include/boost/phoenix/scope/lambda.hpp b/include/boost/phoenix/scope/lambda.hpp
index 7942608..b67484b 100644
--- a/include/boost/phoenix/scope/lambda.hpp
+++ b/include/boost/phoenix/scope/lambda.hpp
@@ -117,7 +117,7 @@ namespace boost { namespace phoenix
                   , proto::value(locals)
                 );
 
-            return eval(lambda, context(scoped_env, actions(ctx)));
+            return boost::phoenix::eval(lambda, context(scoped_env, actions(ctx)));
         }
     };
 
diff --git a/include/boost/phoenix/scope/let.hpp b/include/boost/phoenix/scope/let.hpp
index 1dfcf78..435b0a1 100644
--- a/include/boost/phoenix/scope/let.hpp
+++ b/include/boost/phoenix/scope/let.hpp
@@ -103,7 +103,7 @@ namespace boost { namespace phoenix
                   , l
                 );
 
-            return eval(let, context(scoped_env, actions(ctx)));
+            return boost::phoenix::eval(let, context(scoped_env, actions(ctx)));
         }
     };