1 files changed, 1 insertions, 0 deletions

diff --git a/src/fitnessfunction.h b/src/fitnessfunction.h
index c41f733..0f852fa 100644
--- a/src/fitnessfunction.h
+++ b/src/fitnessfunction.h
@@ -12,6 +12,7 @@ namespace Genetic
                 virtual ~FitnessFunction();
 
                 virtual double operator()( Phenotype *pTest )=0;
+                virtual FitnessFunction *clone() const=0;
         };
 };