diff --git a/apps/shared/editable_cell_table_view_controller.cpp b/apps/shared/editable_cell_table_view_controller.cpp
index 0c7c733d7..c77296769 100644
--- a/apps/shared/editable_cell_table_view_controller.cpp
+++ b/apps/shared/editable_cell_table_view_controller.cpp
@@ -22,7 +22,10 @@ bool EditableCellTableViewController::textFieldDidFinishEditing(TextField * text
     app()->displayWarning(I18n::Message::UndefinedValue);
     return false;
   }
-  setDataAtLocation(floatBody, m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow());
+  if (!setDataAtLocation(floatBody, m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow())) {
+    app()->displayWarning(I18n::Message::ForbiddenValue);
+    return false;
+  }
   willDisplayCellAtLocation(m_selectableTableView.cellAtLocation(m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow()), m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow());
   m_selectableTableView.reloadData();
   m_selectableTableView.selectCellAtLocation(m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow()+1);
diff --git a/apps/shared/editable_cell_table_view_controller.h b/apps/shared/editable_cell_table_view_controller.h
index 9702ec8aa..6518207dd 100644
--- a/apps/shared/editable_cell_table_view_controller.h
+++ b/apps/shared/editable_cell_table_view_controller.h
@@ -27,7 +27,7 @@ private:
   TextFieldDelegateApp * textFieldDelegateApp() override;
   static constexpr KDCoordinate k_cellHeight = 20;
   virtual bool cellAtLocationIsEditable(int columnIndex, int rowIndex) = 0;
-  virtual void setDataAtLocation(float floatBody, int columnIndex, int rowIndex) = 0;
+  virtual bool setDataAtLocation(float floatBody, int columnIndex, int rowIndex) = 0;
   virtual float dataAtLocation(int columnIndex, int rowIndex) = 0;
   virtual int numberOfElements() = 0;
   virtual int maxNumberOfElements() const = 0;
diff --git a/apps/shared/store_controller.cpp b/apps/shared/store_controller.cpp
index 00f425ebc..692b9de74 100644
--- a/apps/shared/store_controller.cpp
+++ b/apps/shared/store_controller.cpp
@@ -112,8 +112,9 @@ bool StoreController::cellAtLocationIsEditable(int columnIndex, int rowIndex) {
   return false;
 }
 
-void StoreController::setDataAtLocation(float floatBody, int columnIndex, int rowIndex) {
+bool StoreController::setDataAtLocation(float floatBody, int columnIndex, int rowIndex) {
   m_store->set(floatBody, columnIndex, rowIndex-1);
+  return true;
 }
 
 float StoreController::dataAtLocation(int columnIndex, int rowIndex) {
diff --git a/apps/shared/store_controller.h b/apps/shared/store_controller.h
index a1204d60b..6ed900e7c 100644
--- a/apps/shared/store_controller.h
+++ b/apps/shared/store_controller.h
@@ -28,7 +28,7 @@ protected:
   constexpr static int k_numberOfTitleCells = 2;
   Responder * tabController() const override;
   bool cellAtLocationIsEditable(int columnIndex, int rowIndex) override;
-  void setDataAtLocation(float floatBody, int columnIndex, int rowIndex) override;
+  bool setDataAtLocation(float floatBody, int columnIndex, int rowIndex) override;
   float dataAtLocation(int columnIndex, int rowIndex) override;
   int numberOfElements() override;
   int maxNumberOfElements() const override;
diff --git a/apps/shared/values_controller.cpp b/apps/shared/values_controller.cpp
index c07e0b03a..cfac54c19 100644
--- a/apps/shared/values_controller.cpp
+++ b/apps/shared/values_controller.cpp
@@ -260,8 +260,9 @@ bool ValuesController::cellAtLocationIsEditable(int columnIndex, int rowIndex) {
   return false;
 }
 
-void ValuesController::setDataAtLocation(float floatBody, int columnIndex, int rowIndex) {
+bool ValuesController::setDataAtLocation(float floatBody, int columnIndex, int rowIndex) {
   m_interval.setElement(rowIndex-1, floatBody);
+  return true;
 }
 
 float ValuesController::dataAtLocation(int columnIndex, int rowIndex) {
diff --git a/apps/shared/values_controller.h b/apps/shared/values_controller.h
index c9a4f6632..66802a629 100644
--- a/apps/shared/values_controller.h
+++ b/apps/shared/values_controller.h
@@ -47,7 +47,7 @@ private:
   void configureAbscissa();
   void configureFunction();
   bool cellAtLocationIsEditable(int columnIndex, int rowIndex) override;
-  void setDataAtLocation(float floatBody, int columnIndex, int rowIndex) override;
+  bool setDataAtLocation(float floatBody, int columnIndex, int rowIndex) override;
   float dataAtLocation(int columnIndex, int rowIndex) override;
   int numberOfElements() override;
   int maxNumberOfElements() const override;
diff --git a/apps/statistics/store_controller.cpp b/apps/statistics/store_controller.cpp
index 66d087bec..271290e67 100644
--- a/apps/statistics/store_controller.cpp
+++ b/apps/statistics/store_controller.cpp
@@ -32,4 +32,15 @@ HighlightCell * StoreController::titleCells(int index) {
   return &m_titleCells[index];
 }
 
+bool StoreController::setDataAtLocation(float floatBody, int columnIndex, int rowIndex) {
+  if (columnIndex == 1) {
+    if (floatBody < 0) {
+      return false;
+    }
+    m_store->set(roundf(floatBody), columnIndex, rowIndex-1);
+    return true;
+  }
+  return Shared::StoreController::setDataAtLocation(floatBody, columnIndex, rowIndex);
+}
+
 }
diff --git a/apps/statistics/store_controller.h b/apps/statistics/store_controller.h
index 3d50afdc9..5ecaaf5fa 100644
--- a/apps/statistics/store_controller.h
+++ b/apps/statistics/store_controller.h
@@ -12,6 +12,7 @@ public:
   StoreController(Responder * parentResponder, Store * store, ButtonRowController * header);
   void willDisplayCellAtLocation(HighlightCell * cell, int i, int j) override;
 private:
+  bool setDataAtLocation(float floatBody, int columnIndex, int rowIndex) override;
   HighlightCell * titleCells(int index) override;
   EvenOddMessageTextCell m_titleCells[k_numberOfTitleCells];
 };