diff --git a/poincare/include/poincare/expression_node.h b/poincare/include/poincare/expression_node.h
index 4499bcee7..f9b5f7ebd 100644
--- a/poincare/include/poincare/expression_node.h
+++ b/poincare/include/poincare/expression_node.h
@@ -147,7 +147,7 @@ public:
   virtual Evaluation<double> approximate(DoublePrecision p, Context& context, Preferences::AngleUnit angleUnit) const = 0;
 
   /* Simplification */
-  /*!*/ virtual Expression shallowReduce(Context & context, Preferences::AngleUnit angleUnit);
+  /*!*/ virtual Expression shallowReduce(Context & context, Preferences::AngleUnit angleUnit, const Expression futureParent = Expression());
   /*!*/ virtual Expression shallowBeautify(Context & context, Preferences::AngleUnit angleUnit);
   /* Return a clone of the denominator part of the expression */
   /*!*/ virtual Expression denominator(Context & context, Preferences::AngleUnit angleUnit) const;
diff --git a/poincare/src/expression_node.cpp b/poincare/src/expression_node.cpp
index 8e73a479a..082e0fab4 100644
--- a/poincare/src/expression_node.cpp
+++ b/poincare/src/expression_node.cpp
@@ -88,8 +88,8 @@ int ExpressionNode::simplificationOrderSameType(const ExpressionNode * e, bool c
   return 0;
 }
 
-Expression ExpressionNode::shallowReduce(Context & context, Preferences::AngleUnit angleUnit) {
-  return Expression(this).defaultShallowReduce(context, angleUnit);
+Expression ExpressionNode::shallowReduce(Context & context, Preferences::AngleUnit angleUnit, const Expression futureParent) {
+  return Expression(this).defaultShallowReduce(context, angleUnit, futureParent);
 }
 
 Expression ExpressionNode::shallowBeautify(Context & context, Preferences::AngleUnit angleUnit) {