diff --git a/tensorflow/core/platform/env.cc b/tensorflow/core/platform/env.cc
index 6a40a51e3f1..9a1e494c737 100644
--- a/tensorflow/core/platform/env.cc
+++ b/tensorflow/core/platform/env.cc
@@ -301,7 +301,7 @@ class FileStream : public ::tensorflow::protobuf::io::ZeroCopyInputStream {
     pos_ += count;
     return true;
   }
-  int64 ByteCount() const override { return pos_; }
+  google::protobuf::int64 ByteCount() const override { return pos_; }
   Status status() const { return status_; }
 
   bool Next(const void** data, int* size) override {