diff --git a/src/utils/moving_average.hpp b/src/utils/moving_average.hpp
index 1a9bff0..fe4d337 100644
--- a/src/utils/moving_average.hpp
+++ b/src/utils/moving_average.hpp
@@ -1,47 +1,51 @@
 #ifndef SPECMICP_UTILS_MOVINGAVERAGE_HPP
 #define SPECMICP_UTILS_MOVINGAVERAGE_HPP
 
 #include "common.hpp"
 
 namespace specmicp {
 namespace utils {
 
 //! \brief Exponential moving average
 //!
 //! https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average
 //!
 //! @param alpha coefficient between 0 and 1
 //! @param init initial value of the average
 class ExponentialMovingAverage
 {
 public:
     ExponentialMovingAverage(scalar_t alpha, scalar_t init):
         m_alpha(alpha),
         m_current_value(init)
     {
     }
     //! \brief Add a point in the series, return current average value
     scalar_t add_point(scalar_t value){
         m_current_value = m_alpha*value + (1-m_alpha)*m_current_value;
         return m_current_value;
     }
 
     //! \brief Return the current average value
     scalar_t current_value() {
         return m_current_value;
     }
     //! \brief Reset the average to 'value'
     void reset(scalar_t value) {
         m_current_value = value;
     }
 
+    //! \brief Set the parameter value
+    void set_alpha(scalar_t alpha) {m_alpha = alpha;}
+
+
 private:
     scalar_t m_alpha;
     scalar_t m_current_value;
 };
 
 
 } // end namespace utils
 } // end namespace specmicp
 
 #endif // SPECMICP_UTILS_MOVINGAVERAGE_HPP