diff --git a/src/libaevol/7/fuzzy/Discrete_Double_Fuzzy.h b/src/libaevol/7/fuzzy/Discrete_Double_Fuzzy.h
index ced2b9ebc612289ff89dfde395801882ffeb39e1..7cfcadfbec0b070176c2238153489dc4b4c54a46 100644
--- a/src/libaevol/7/fuzzy/Discrete_Double_Fuzzy.h
+++ b/src/libaevol/7/fuzzy/Discrete_Double_Fuzzy.h
@@ -84,8 +84,6 @@ class Discrete_Double_Fuzzy : public AbstractFuzzy_7
   Discrete_Double_Fuzzy(int vector_size);
   Discrete_Double_Fuzzy(int vector_size, const Discrete_Double_Fuzzy& f);
 
-  Discrete_Double_Fuzzy(const Fuzzy&) = delete;
-
   Discrete_Double_Fuzzy(const gzFile backup);
 
   // ==========================================================================