diff --git a/apps/shared/store_parameter_controller.cpp b/apps/shared/store_parameter_controller.cpp
index 50212fee2..97bfc3b55 100644
--- a/apps/shared/store_parameter_controller.cpp
+++ b/apps/shared/store_parameter_controller.cpp
@@ -82,10 +82,11 @@ bool StoreParameterController::handleEvent(Ion::Events::Event event) {
         double * contextBOtherColumn = (static_cast<double*>(context) + DoublePairStore::k_maxNumberOfPairs + b);
         return *contextAOtherColumn > *contextBOtherColumn;
       };
+      double * seriesContext = m_store->data() + m_series * DoublePairStore::k_numberOfColumnsPerSeries * DoublePairStore::k_maxNumberOfPairs;
       if (m_xColumnSelected) {
-        Poincare::Helpers::Sort(swapRows, compareX, (m_store->data() + m_series), m_store->numberOfPairsOfSeries(m_series));
+        Poincare::Helpers::Sort(swapRows, compareX, seriesContext, m_store->numberOfPairsOfSeries(m_series));
       } else {
-        Poincare::Helpers::Sort(swapRows, compareY, (m_store->data() + m_series), m_store->numberOfPairsOfSeries(m_series));
+        Poincare::Helpers::Sort(swapRows, compareY, seriesContext, m_store->numberOfPairsOfSeries(m_series));
       }
       break;
     }
diff --git a/apps/shared/store_parameter_controller.h b/apps/shared/store_parameter_controller.h
index 3198b5239..efc8c6f12 100644
--- a/apps/shared/store_parameter_controller.h
+++ b/apps/shared/store_parameter_controller.h
@@ -13,7 +13,10 @@ class StoreParameterController : public ViewController, public ListViewDataSourc
 public:
   StoreParameterController(Responder * parentResponder, DoublePairStore * store, StoreController * storeController);
   void selectXColumn(bool xColumnSelected) { m_xColumnSelected = xColumnSelected; }
-  void selectSeries(int series) { m_series = series; }
+  void selectSeries(int series) {
+    assert(series >= 0 && series < DoublePairStore::k_numberOfSeries);
+    m_series = series;
+  }
   View * view() override { return &m_selectableTableView; }
   void willDisplayCellForIndex(HighlightCell * cell, int index) override;
   const char * title() override;