diff --git a/src/TensorFlowNET.Keras/Activations.cs b/src/TensorFlowNET.Keras/Activations.cs
index 00de728f2..d6d8e3914 100644
--- a/src/TensorFlowNET.Keras/Activations.cs
+++ b/src/TensorFlowNET.Keras/Activations.cs
@@ -77,6 +77,10 @@ static Activations()
 
         public Activation GetActivationFromName(string name)
         {
+            if (name == null)
+            {
+                return _linear;
+            }
             if (!_nameActivationMap.TryGetValue(name, out var res))
             {
                 throw new Exception($"Activation {name} not found");