diff --git a/apps/graph/values/values_controller.cpp b/apps/graph/values/values_controller.cpp
index 2fadfdd00..0a037f950 100644
--- a/apps/graph/values/values_controller.cpp
+++ b/apps/graph/values/values_controller.cpp
@@ -31,13 +31,13 @@ ValuesController::ValuesController(Responder * parentResponder, InputEventHandle
 void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
   Shared::ValuesController::willDisplayCellAtLocation(cell, i, j);
   // The cell is the abscissa title cell:
-  if (typeAtLocation(i,j) == 0) {
+  if (typeAtLocation(i,j) == k_abscissaTitleCellType) {
     EvenOddMessageTextCell * mytitleCell = (EvenOddMessageTextCell *)cell;
     mytitleCell->setMessage(I18n::Message::X);
     return;
   }
   // The cell is a function title cell:
-  if (typeAtLocation(i,j) == 1) {
+  if (typeAtLocation(i,j) == k_functionTitleCellType) {
     Shared::BufferFunctionTitleCell * myFunctionCell = (Shared::BufferFunctionTitleCell *)cell;
     const size_t bufferNameSize = Shared::Function::k_maxNameWithArgumentSize + 1;
     char bufferName[bufferNameSize];
@@ -75,7 +75,7 @@ Ion::Storage::Record ValuesController::recordAtColumn(int i) {
 }
 
 Ion::Storage::Record ValuesController::recordAtColumn(int i, bool * isDerivative) {
-  assert(typeAtLocation(i, 0) == 1);
+  assert(typeAtLocation(i, 0) == k_functionTitleCellType);
   int plotTypeIndex = 0;
   while (plotTypeIndex < 3 && i >= m_numberOfColumnsForType[plotTypeIndex]) {
     i -= m_numberOfColumnsForType[plotTypeIndex++];
diff --git a/apps/sequence/values/values_controller.cpp b/apps/sequence/values/values_controller.cpp
index 833913c59..7ec00a2e5 100644
--- a/apps/sequence/values/values_controller.cpp
+++ b/apps/sequence/values/values_controller.cpp
@@ -28,14 +28,12 @@ ValuesController::ValuesController(Responder * parentResponder,InputEventHandler
 
 void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
   Shared::ValuesController::willDisplayCellAtLocation(cell, i, j);
-  // The cell is the abscissa title cell:
-  if (typeAtLocation(i,j) == 0) {
+  if (typeAtLocation(i,j) == k_abscissaTitleCellType) {
     EvenOddMessageTextCell * mytitleCell = (EvenOddMessageTextCell *)cell;
     mytitleCell->setMessage(I18n::Message::N);
     return;
   }
-  // The cell is a function title cell:
-  if (typeAtLocation(i,j) == 1) {
+  if (typeAtLocation(i,j) == k_functionTitleCellType) {
     SequenceTitleCell * myCell = (SequenceTitleCell *)cell;
     Sequence * sequence = functionStore()->modelForRecord(recordAtColumn(i));
     myCell->setLayout(sequence->nameLayout());
diff --git a/apps/shared/values_controller.cpp b/apps/shared/values_controller.cpp
index c1f2f842d..941bf1ea4 100644
--- a/apps/shared/values_controller.cpp
+++ b/apps/shared/values_controller.cpp
@@ -77,7 +77,7 @@ bool ValuesController::handleEvent(Ion::Events::Event event) {
   }
   if ((event == Ion::Events::OK || event == Ion::Events::EXE) && selectedRow() == 0) {
     ViewController * parameterController = nullptr;
-    if (typeAtLocation(selectedColumn(), 0) == 0) {
+    if (typeAtLocation(selectedColumn(), 0) == k_abscissaTitleCellType) {
       m_abscissaParameterController.setPageTitle(valuesParameterControllerPageTitle());
       parameterController = &m_abscissaParameterController;
     } else {
@@ -119,7 +119,7 @@ int ValuesController::numberOfButtons(ButtonRowController::Position) const {
 void ValuesController::willDisplayCellAtLocation(HighlightCell * cell, int i, int j) {
   willDisplayCellAtLocationWithDisplayMode(cell, i, j, Preferences::sharedPreferences()->displayMode());
   // The cell is not a title cell and not editable
-  if (typeAtLocation(i,j) == 3) {
+  if (typeAtLocation(i,j) == k_notEditableValueCellType) {
     constexpr int precision = Preferences::LargeNumberOfSignificantDigits;
     char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(precision)];
     // Special case: last row
@@ -216,7 +216,7 @@ void ValuesController::viewDidDisappear() {
 }
 
 Ion::Storage::Record ValuesController::recordAtColumn(int i) {
-  assert(typeAtLocation(i, 0) == 1);
+  assert(typeAtLocation(i, 0) == k_functionTitleCellType);
   return functionStore()->activeRecordAtIndex(i-1);
 }
 
@@ -229,7 +229,7 @@ StackViewController * ValuesController::stackController() const {
 }
 
 bool ValuesController::cellAtLocationIsEditable(int columnIndex, int rowIndex) {
-  return typeAtLocation(columnIndex, rowIndex) == 2;
+  return typeAtLocation(columnIndex, rowIndex) == k_editableValueCellType;
 }
 
 bool ValuesController::setDataAtLocation(double floatBody, int columnIndex, int rowIndex) {
diff --git a/apps/shared/values_controller.h b/apps/shared/values_controller.h
index 36c97f899..f36f6201c 100644
--- a/apps/shared/values_controller.h
+++ b/apps/shared/values_controller.h
@@ -40,7 +40,13 @@ public:
   static constexpr KDCoordinate k_rightMargin = 15;
   static constexpr KDCoordinate k_abscissaCellWidth = 100;
   static constexpr KDCoordinate k_ordinateCellWidth = 100;
+
 protected:
+  static constexpr int k_abscissaTitleCellType = 0;
+  static constexpr int k_functionTitleCellType = 1;
+  static constexpr int k_editableValueCellType = 2;
+  static constexpr int k_notEditableValueCellType = 3;
+
   static constexpr const KDFont * k_font = KDFont::SmallFont;
   StackViewController * stackController() const;
   bool setDataAtLocation(double floatBody, int columnIndex, int rowIndex) override;