diff --git a/src/solver/libModelObject/CMakeLists.txt b/src/solver/libModelObject/CMakeLists.txt
index bb489afd7e..d1272d6b5a 100644
--- a/src/solver/libModelObject/CMakeLists.txt
+++ b/src/solver/libModelObject/CMakeLists.txt
@@ -28,6 +28,7 @@ target_include_directories(antares-solver-libObjectModel
 )
 target_link_libraries(antares-solver-libObjectModel
         PUBLIC
+        Antares::solver-expressions
 )
 install(DIRECTORY include/antares
         DESTINATION "include"
diff --git a/src/solver/libModelObject/include/antares/solver/libObjectModel/expression.h b/src/solver/libModelObject/include/antares/solver/libObjectModel/expression.h
index 87fefbc8c5..6c505cc90c 100644
--- a/src/solver/libModelObject/include/antares/solver/libObjectModel/expression.h
+++ b/src/solver/libModelObject/include/antares/solver/libObjectModel/expression.h
@@ -22,6 +22,8 @@
 
 #include <string>
 
+#include <antares/solver/expressions/nodes/Node.h>
+
 namespace Antares::Solver::ObjectModel
 {
 
@@ -40,8 +42,15 @@ class Expression
         return value_;
     }
 
+    const Nodes::Node* Node() const
+    {
+        return node_;
+    }
+
 private:
     std::string value_;
+
+    Nodes::Node* node_;
 };
 
 } // namespace Antares::Solver::ObjectModel