diff --git a/tensorflow/g3doc/api_docs/python/contrib.learn.md b/tensorflow/g3doc/api_docs/python/contrib.learn.md
index 8287bfc0bdc4fc..a6417b2522a5eb 100644
--- a/tensorflow/g3doc/api_docs/python/contrib.learn.md
+++ b/tensorflow/g3doc/api_docs/python/contrib.learn.md
@@ -49,7 +49,8 @@ Evaluates given model with provided evaluation data.
 *  <b>`batch_size`</b>: minibatch size to use on the input, defaults to 32. Ignored
     if input_fn is set.
 *  <b>`steps`</b>: Number of steps to evalute for.
-*  <b>`metrics`</b>: Dict of metric ops to run.
+*  <b>`metrics`</b>: Dict of metric ops to run. If None, the default metric functions
+    are used; if {}, no metrics are used.
 
 ##### Returns:
 
@@ -254,7 +255,8 @@ Evaluates given model with provided evaluation data.
 *  <b>`batch_size`</b>: minibatch size to use on the input, defaults to 32. Ignored
     if input_fn is set.
 *  <b>`steps`</b>: Number of steps to evalute for.
-*  <b>`metrics`</b>: Dict of metric ops to run.
+*  <b>`metrics`</b>: Dict of metric ops to run. If None, the default metric functions
+    are used; if {}, no metrics are used.
 
 ##### Returns:
 
diff --git a/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.BaseEstimator.md b/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.BaseEstimator.md
index 39ec7ac3abdd65..90968f8c8d294f 100644
--- a/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.BaseEstimator.md
+++ b/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.BaseEstimator.md
@@ -34,7 +34,8 @@ Evaluates given model with provided evaluation data.
 *  <b>`batch_size`</b>: minibatch size to use on the input, defaults to 32. Ignored
     if input_fn is set.
 *  <b>`steps`</b>: Number of steps to evalute for.
-*  <b>`metrics`</b>: Dict of metric ops to run.
+*  <b>`metrics`</b>: Dict of metric ops to run. If None, the default metric functions
+    are used; if {}, no metrics are used.
 
 ##### Returns:
 
diff --git a/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.Estimator.md b/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.Estimator.md
index 91f0967ce95c60..69130db065ba41 100644
--- a/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.Estimator.md
+++ b/tensorflow/g3doc/api_docs/python/functions_and_classes/tf.contrib.learn.Estimator.md
@@ -39,7 +39,8 @@ Evaluates given model with provided evaluation data.
 *  <b>`batch_size`</b>: minibatch size to use on the input, defaults to 32. Ignored
     if input_fn is set.
 *  <b>`steps`</b>: Number of steps to evalute for.
-*  <b>`metrics`</b>: Dict of metric ops to run.
+*  <b>`metrics`</b>: Dict of metric ops to run. If None, the default metric functions
+    are used; if {}, no metrics are used.
 
 ##### Returns: