diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 52f351b61..f646a4029 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -144,7 +144,7 @@ bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const
   return false;
 }
 
-bool SumGraphController::textFieldDidAbortEditing(TextField * textField, const char * text) {
+bool SumGraphController::textFieldDidAbortEditing(TextField * textField) {
   char buffer[PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits)];
   double parameter = NAN;
   switch(m_step) {
@@ -265,7 +265,7 @@ void SumGraphController::LegendView::setSumSymbol(Step step, double start, doubl
     childrenLayouts[0] = m_sumLayout;
     m_sumLayout = new HorizontalLayout(childrenLayouts, 3);
   }
-  m_sum.setExpression(m_sumLayout);
+  m_sum.setExpressionLayout(m_sumLayout);
   if (step == Step::Result) {
     m_sum.setAlignment(0.5f, 0.5f);
   } else {
diff --git a/apps/shared/sum_graph_controller.h b/apps/shared/sum_graph_controller.h
index 4915de927..98a110957 100644
--- a/apps/shared/sum_graph_controller.h
+++ b/apps/shared/sum_graph_controller.h
@@ -20,7 +20,7 @@ public:
   bool handleEvent(Ion::Events::Event event) override;
   void setFunction(Function * function);
   bool textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) override;
-  bool textFieldDidAbortEditing(TextField * textField, const char * text) override;
+  bool textFieldDidAbortEditing(TextField * textField) override;
   bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
 protected:
   virtual bool moveCursorHorizontallyToPosition(double position);