diff --git a/model/activation.py b/model/activation.py
index b710494..c52c233 100644
--- a/model/activation.py
+++ b/model/activation.py
@@ -5,4 +5,8 @@
 def sublinear(x):
     return x / (1 + K.sqrt(K.sqrt(K.abs(x))))
 
+def linear(x):
+    return x
+    #return x / (1 + K.sqrt(K.sqrt(K.abs(x))))
+
 # EOF