diff --git a/include/GEnergy.hpp b/include/GEnergy.hpp
index 5eec807..43b9732 100644
--- a/include/GEnergy.hpp
+++ b/include/GEnergy.hpp
@@ -48,6 +48,7 @@ public:
     GEnergy& operator= (const GEnergy& eng);
 
     // Methods
+    void   clear(void) { m_energy = 0.0; }
     double keV(void) const;
     double MeV(void) const;
     double GeV(void) const;
diff --git a/include/GTime.hpp b/include/GTime.hpp
index 93f5ea2..931af9d 100644
--- a/include/GTime.hpp
+++ b/include/GTime.hpp
@@ -48,6 +48,7 @@ public:
     GTime& operator= (const GTime& time);
 
     // Methods
+    void   clear(void) { m_time = 0.0; }
     double mjd(void) const;
     void   mjd(const double& time);
     double met(void) const;