diff --git a/include/NeuralNetwork/ActivationFunction/ActivationFunction.h b/include/NeuralNetwork/ActivationFunction/ActivationFunction.h
index e5a6591..20ec8c4 100644
--- a/include/NeuralNetwork/ActivationFunction/ActivationFunction.h
+++ b/include/NeuralNetwork/ActivationFunction/ActivationFunction.h
@@ -46,7 +46,6 @@ namespace ActivationFunction {
 			 */
 			virtual ActivationFunction* clone() const = 0;
 
-			const static bool FORCE_REGISTER;
 	};
 
 	typedef SimpleJSON::Factory<ActivationFunction> Factory;