diff --git a/tensorflow/core/api_def/base_api/api_def_Acosh.pbtxt b/tensorflow/core/api_def/base_api/api_def_Acosh.pbtxt
index d736a51ef46..41a7b9acf61 100644
--- a/tensorflow/core/api_def/base_api/api_def_Acosh.pbtxt
+++ b/tensorflow/core/api_def/base_api/api_def_Acosh.pbtxt
@@ -3,7 +3,7 @@ op {
   summary: "Computes inverse hyperbolic cosine of x element-wise."
   description: <<END
 Given an input tensor, the function computes inverse hyperbolic cosine of every element.
-Input range is [1, infinity). It return `nan` if the input lies outside the range.
+Input range is [1, infinity). It returns `nan` if the input lies outside the range.
 ```python
 tensor `x` is [-2, -0.5, 1, 1.2, 200, 10000]
 tf.acosh(x) ==> [nan nan 0. 0.62236255 5.9914584 9.903487]