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-rw-r--r--tensorflow/core/lib/gtl/edit_distance_test.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/tensorflow/core/lib/gtl/edit_distance_test.cc b/tensorflow/core/lib/gtl/edit_distance_test.cc
index 02968b6ae8..18a400713f 100644
--- a/tensorflow/core/lib/gtl/edit_distance_test.cc
+++ b/tensorflow/core/lib/gtl/edit_distance_test.cc
@@ -15,6 +15,7 @@ limitations under the License.
#include "tensorflow/core/lib/gtl/edit_distance.h"
+#include <cctype>
#include <vector>
#include "tensorflow/core/platform/logging.h"
#include "tensorflow/core/platform/test.h"