Update the document for label_image.
diff --git a/tensorflow/lite/g3doc/guide/build_cmake.md b/tensorflow/lite/g3doc/guide/build_cmake.md
index b833b7c..ebfa8d2 100644
--- a/tensorflow/lite/g3doc/guide/build_cmake.md
+++ b/tensorflow/lite/g3doc/guide/build_cmake.md
@@ -102,7 +102,7 @@
 ["Create a CMake project which uses TensorFlow Lite"](#create_a_cmake_project_which_uses_tensorflow_lite)
 section.
 
-### Step 6. Build TensorFlow Lite Benchmark Tool and Label Image Example
+### Step 6. Build TensorFlow Lite Benchmark Tool and Label Image Example(Optional)
 
 In the tflite_build directory,