diff --git a/apps/graph/cartesian_function.h b/apps/graph/cartesian_function.h
index 3f84dbeb1..2cb0984f4 100644
--- a/apps/graph/cartesian_function.h
+++ b/apps/graph/cartesian_function.h
@@ -7,7 +7,6 @@ namespace Graph {
 
 class CartesianFunction : public Shared::Function {
 public:
-  static constexpr const char * Parameter = "(x)";
   using Shared::Function::Function;
   CartesianFunction(const char * text = nullptr, KDColor color = KDColorBlack);
   bool displayDerivative();
diff --git a/apps/graph/cartesian_function_store.cpp b/apps/graph/cartesian_function_store.cpp
index c616bcb42..917efcdb8 100644
--- a/apps/graph/cartesian_function_store.cpp
+++ b/apps/graph/cartesian_function_store.cpp
@@ -63,6 +63,10 @@ int CartesianFunctionStore::maxNumberOfFunctions() {
   return k_maxNumberOfFunctions;
 }
 
+char CartesianFunctionStore::symbol() const {
+  return 'x';
+}
+
 const char *  CartesianFunctionStore::firstAvailableName() {
   for (int k = 0; k < k_maxNumberOfFunctions; k++) {
     int j = 0;
diff --git a/apps/graph/cartesian_function_store.h b/apps/graph/cartesian_function_store.h
index 7c9ef8b40..f02c6cdb9 100644
--- a/apps/graph/cartesian_function_store.h
+++ b/apps/graph/cartesian_function_store.h
@@ -18,6 +18,7 @@ public:
   CartesianFunction * addEmptyFunction() override;
   void removeFunction(Shared::Function * f) override;
   int maxNumberOfFunctions() override;
+  char symbol() const override;
   static constexpr int k_maxNumberOfFunctions = 8;
 private:
   const char * firstAvailableName() override;
diff --git a/apps/graph/list/list_controller.cpp b/apps/graph/list/list_controller.cpp
index c174b5db0..597b32de3 100644
--- a/apps/graph/list/list_controller.cpp
+++ b/apps/graph/list/list_controller.cpp
@@ -79,7 +79,7 @@ HighlightCell * ListController::expressionCells(int index) {
 void ListController::willDisplayTitleCellAtIndex(HighlightCell * cell, int j) {
   FunctionTitleCell * myFunctionCell = (FunctionTitleCell *)cell;
   CartesianFunction * function = ((CartesianFunctionStore *)m_functionStore)->functionAtIndex(j);
-  char bufferName[5] = {*function->name(),'(',function->symbol(),')', 0};
+  char bufferName[5] = {*function->name(),'(', m_functionStore->symbol(),')', 0};
   myFunctionCell->setText(bufferName);
   KDColor functionNameColor = function->isActive() ? function->color() : Palette::GreyDark;
   myFunctionCell->setColor(functionNameColor);
diff --git a/apps/sequence/sequence.h b/apps/sequence/sequence.h
index 588eca590..785809aa3 100644
--- a/apps/sequence/sequence.h
+++ b/apps/sequence/sequence.h
@@ -24,7 +24,6 @@ public:
   Poincare::ExpressionLayout * secondInitialConditionLayout();
   void setFirstInitialConditionContent(const char * c);
   void setSecondInitialConditionContent(const char * c);
-  char symbol() const override;
   int numberOfElements();
   Poincare::ExpressionLayout * definitionName();
   Poincare::ExpressionLayout * firstInitialConditionName();
@@ -32,6 +31,7 @@ public:
   bool isDefined() override;
   float evaluateAtAbscissa(float x, Poincare::Context * context) const override;
 private:
+  char symbol() const override;
   Type m_type;
   char m_firstInitialConditionText[Shared::Function::k_bodyLength];
   char m_secondInitialConditionText[Shared::Function::k_bodyLength];
diff --git a/apps/sequence/sequence_store.cpp b/apps/sequence/sequence_store.cpp
index 4b030cf8b..2c118e5be 100644
--- a/apps/sequence/sequence_store.cpp
+++ b/apps/sequence/sequence_store.cpp
@@ -56,6 +56,10 @@ int SequenceStore::maxNumberOfFunctions() {
   return k_maxNumberOfSequences;
 }
 
+char SequenceStore::symbol() const {
+  return 'n';
+}
+
 const char *  SequenceStore::firstAvailableName() {
   for (int k = 0; k < k_maxNumberOfSequences; k++) {
     int j = 0;
diff --git a/apps/sequence/sequence_store.h b/apps/sequence/sequence_store.h
index 11f96740a..83b1d9335 100644
--- a/apps/sequence/sequence_store.h
+++ b/apps/sequence/sequence_store.h
@@ -19,6 +19,7 @@ public:
   void removeFunction(Shared::Function * f) override;
   int maxNumberOfFunctions() override;
   const char * firstAvailableName() override;
+  char symbol() const override;
   static constexpr int k_maxNumberOfSequences = 3;
 private:
   const KDColor firstAvailableColor() override;
diff --git a/apps/shared/function_store.h b/apps/shared/function_store.h
index 6aa02f57d..497a55806 100644
--- a/apps/shared/function_store.h
+++ b/apps/shared/function_store.h
@@ -24,6 +24,7 @@ public:
   // An active function must be defined to be counted
   int numberOfActiveFunctions();
   virtual int maxNumberOfFunctions() = 0;
+  virtual char symbol() const = 0;
 protected:
   int m_numberOfFunctions;
 private: