diff --git a/cudarray/nnet/math.py b/cudarray/nnet/math.py
index f91bb61..9ad1dce 100644
--- a/cudarray/nnet/math.py
+++ b/cudarray/nnet/math.py
@@ -19,6 +19,8 @@ def sigmoid(x, out=None):
 def sigmoid_d(x, out=None):
     return unary(elementwise.sigmoid_d_op, x, out)
 
+def tanh(x, out=None):
+    return unary(elementwise.tanh_op, x, out)
 
 def tanh_d(x, out=None):
     return unary(elementwise.tanh_d_op, x, out)