Add import.

PiperOrigin-RevId: 197820050

diff --git a/tensorflow/python/util/util.cc b/tensorflow/python/util/util.cc
index 386a6fb..2b33d10 100644 (file)
--- a/tensorflow/python/util/util.cc
+++ b/tensorflow/python/util/util.cc
@@ -14,6 +14,7 @@ limitations under the License.
 ==============================================================================*/
 #include "tensorflow/python/util/util.h"
 
+#include <functional>
 #include <unordered_map>
 #include <vector>