diff --git a/pyext/ctool.i b/pyext/ctool.i
index 4e65bb0..b915dbb 100755
--- a/pyext/ctool.i
+++ b/pyext/ctool.i
@@ -140,6 +140,7 @@ public:
 
     // Protected methods that create objects from user parameters
     GEbounds          create_ebounds(void);
+    GEnergies         create_energies(void);
     GSkyMap           create_map(const GObservations& obs);
     GCTAEventCube     create_cube(const GObservations& obs);
     GCTAObservation   create_cta_obs(void);