diff --git a/tutorials/tutorial4.cpp b/tutorials/tutorial4.cpp
index 074941a22..9463d9407 100644
--- a/tutorials/tutorial4.cpp
+++ b/tutorials/tutorial4.cpp
@@ -264,7 +264,7 @@ int main ()
     ///          what the interface expects. The first argument is the (unique) name of the group.
     /// \snippet tutorial4.cpp injection specification
     /// \internal[injection specification]
-    std::tr1::shared_ptr<WellsGroupInterface> well_group(new WellsGroup("group", well_group_prod_spec, InjectionSpecification(), 
+    boost::shared_ptr<WellsGroupInterface> well_group(new WellsGroup("group", well_group_prod_spec, InjectionSpecification(), 
                                                                         phase_usage));
     /// \internal[injection specification]
     /// \endinternal
@@ -289,7 +289,7 @@ int main ()
         well_name << "well" << i;
         ProductionSpecification production_specification;
         production_specification.control_mode_ = ProductionSpecification::GRUP;
-        std::tr1::shared_ptr<WellsGroupInterface> well_leaf_node(new WellNode(well_name.str(), production_specification, InjectionSpecification(), 
+        boost::shared_ptr<WellsGroupInterface> well_leaf_node(new WellNode(well_name.str(), production_specification, InjectionSpecification(), 
                                                                               phase_usage));
         well_collection.addChild(well_leaf_node, "group");