diff --git a/apps/shared/storage_expression_model.cpp b/apps/shared/storage_expression_model.cpp
index 39849c688..678ea5f30 100644
--- a/apps/shared/storage_expression_model.cpp
+++ b/apps/shared/storage_expression_model.cpp
@@ -30,7 +30,7 @@ void StorageExpressionModel::text(char * buffer, size_t bufferSize) const {
 
 bool StorageExpressionModel::isCircularlyDefined(Poincare::Context * context) const {
   if (m_circular == -1) {
-    m_circular = Expression::ExpressionWithoutSymbols(expressionReduced(context), *context).isUninitialized();
+    m_circular = Expression::ExpressionWithoutSymbols(expressionClone(), *context).isUninitialized();
   }
   return m_circular;
 }
diff --git a/poincare/include/poincare/expression.h b/poincare/include/poincare/expression.h
index 57cdc0081..db8454bfd 100644
--- a/poincare/include/poincare/expression.h
+++ b/poincare/include/poincare/expression.h
@@ -247,7 +247,6 @@ protected:
   int getPolynomialCoefficients(Context & context, const char * symbolName, Expression coefficients[]) const { return node()->getPolynomialCoefficients(context, symbolName, coefficients); }
   bool hasReplaceableSymbols(Context & context) const;
   Expression shallowReplaceReplaceableSymbols(Context & context) { return node()->shallowReplaceReplaceableSymbols(context); }
-  Expression defaultReplaceReplaceableSymbols(Context & context);
 
   /* Simplification */
   Expression denominator(Context & context, Preferences::AngleUnit angleUnit) const { return node()->denominator(context, angleUnit); }
diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index bc778b8c9..76ebd4a95 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -238,14 +238,6 @@ bool Expression::hasReplaceableSymbols(Context & context) const {
       }, context, false);
 }
 
-Expression Expression::defaultReplaceReplaceableSymbols(Context & context) {
-  int nbChildren = numberOfChildren();
-  for (int i = 0; i < nbChildren; i++) {
-    childAtIndex(i).shallowReplaceReplaceableSymbols(context);
-  }
-  return *this;
-}
-
 template<typename U>
 Evaluation<U> Expression::approximateToEvaluation(Context& context, Preferences::AngleUnit angleUnit) const {
   return node()->approximate(U(), context, angleUnit);
diff --git a/poincare/src/expression_node.cpp b/poincare/src/expression_node.cpp
index 97719c681..e2fd711df 100644
--- a/poincare/src/expression_node.cpp
+++ b/poincare/src/expression_node.cpp
@@ -28,7 +28,7 @@ int ExpressionNode::getPolynomialCoefficients(Context & context, const char * sy
 }
 
 Expression ExpressionNode::shallowReplaceReplaceableSymbols(Context & context) {
-  return Expression(this).defaultReplaceReplaceableSymbols(context);
+  return Expression(this);
 }
 
 int ExpressionNode::getVariables(Context & context, isVariableTest isVariable, char * variables, int maxSizeVariable) const {