diff --git a/paddle/fluid/operators/activation_op.cc b/paddle/fluid/operators/activation_op.cc
index 7dedb36d6e1ef3ed6ebce5be3e53928ee53a984a..ed663e2be4344d2cbbdb97ab95137c574f91724b 100644
--- a/paddle/fluid/operators/activation_op.cc
+++ b/paddle/fluid/operators/activation_op.cc
@@ -365,9 +365,9 @@ class AtanOpMaker : public framework::OpProtoAndCheckerMaker {
     AddInput("X", "Input of atan operator");
     AddOutput("Out", "Output of atan operator");
     AddComment(R"DOC(
-Arctanh Activation Operator.
+Arctangent Operator.
 
-$$out = \tanh^{-1}(x)$$
+$$out = \tan^{-1}(x)$$
 
 )DOC");
   }