diff --git a/apps/shared/interval.cpp b/apps/shared/interval.cpp
index 4754feb3d..d39270635 100644
--- a/apps/shared/interval.cpp
+++ b/apps/shared/interval.cpp
@@ -53,6 +53,10 @@ void Interval::setElement(int i, double f) {
   }
 }
 
+void Interval::setNeedRecompute(bool needrecompute) {
+  m_needCompute = needrecompute; 
+}
+
 void Interval::reset() {
   m_start = 0.0;
   m_end = 10.0;
diff --git a/apps/shared/interval.h b/apps/shared/interval.h
index 4fed90449..bb2151c40 100644
--- a/apps/shared/interval.h
+++ b/apps/shared/interval.h
@@ -18,6 +18,8 @@ public:
   void setEnd(double f);
   void setStep(double f);
   void setElement(int i, double f);
+  bool NeedRecompute() const { return m_needCompute; }
+  void setNeedRecompute(bool needrecompute);
   void reset();
   void clear();
   // TODO: decide the max number of elements after optimization
diff --git a/apps/shared/interval_parameter_controller.cpp b/apps/shared/interval_parameter_controller.cpp
index 7ab9e275c..c5255e386 100644
--- a/apps/shared/interval_parameter_controller.cpp
+++ b/apps/shared/interval_parameter_controller.cpp
@@ -85,6 +85,7 @@ int IntervalParameterController::reusableParameterCellCount(int type) {
 }
 
 void IntervalParameterController::buttonAction() {
+  m_interval->setNeedRecompute(true);
   StackViewController * stack = stackController();
   stack->pop();
   if (stack->depth() > 1) {