diff --git a/mediapipe/util/tensor_to_detection.cc b/mediapipe/util/tensor_to_detection.cc
index 0b3d1f68a..1c19b3510 100644
--- a/mediapipe/util/tensor_to_detection.cc
+++ b/mediapipe/util/tensor_to_detection.cc
@@ -87,7 +87,7 @@ Status TensorsToDetections(const ::tensorflow::Tensor& num_detections,
       const auto& num_boxes_scalar = num_detections.scalar<float>();
       num_boxes = static_cast<int>(num_boxes_scalar());
     } else {
-      num_boxes = num_detections.scalar<int32>()();
+      num_boxes = num_detections.scalar<int32_t>()();
     }
     if (boxes.dim_size(0) < num_boxes) {
       return InvalidArgumentError(
diff --git a/mediapipe/util/time_series_util.cc b/mediapipe/util/time_series_util.cc
index 1e20daa59..87f69475a 100644
--- a/mediapipe/util/time_series_util.cc
+++ b/mediapipe/util/time_series_util.cc
@@ -29,7 +29,7 @@ namespace time_series_util {
 
 bool LogWarningIfTimestampIsInconsistent(const Timestamp& current_timestamp,
                                          const Timestamp& initial_timestamp,
-                                         int64 cumulative_samples,
+                                         int64_t cumulative_samples,
                                          double sample_rate) {
   // Ignore the "special" timestamp value Done().
   if (current_timestamp == Timestamp::Done()) return true;
@@ -122,11 +122,11 @@ absl::Status IsMatrixShapeConsistentWithHeader(const Matrix& matrix,
   return absl::OkStatus();
 }
 
-int64 SecondsToSamples(double time_in_seconds, double sample_rate) {
+int64_t SecondsToSamples(double time_in_seconds, double sample_rate) {
   return round(time_in_seconds * sample_rate);
 }
 
-double SamplesToSeconds(int64 num_samples, double sample_rate) {
+double SamplesToSeconds(int64_t num_samples, double sample_rate) {
   DCHECK_NE(sample_rate, 0.0);
   return (num_samples / sample_rate);
 }
diff --git a/mediapipe/util/time_series_util_test.cc b/mediapipe/util/time_series_util_test.cc
index 807bc4f03..e8d47dbc6 100644
--- a/mediapipe/util/time_series_util_test.cc
+++ b/mediapipe/util/time_series_util_test.cc
@@ -186,7 +186,7 @@ TEST(TimeSeriesUtilTest, SecondsToSamples) {
 
 TEST(TimeSeriesUtilTest, SamplesToSeconds) {
   double sample_rate = 32.5;
-  int64 num_samples = 128;
+  int64_t num_samples = 128;
   EXPECT_EQ(num_samples / sample_rate,
             SamplesToSeconds(num_samples, sample_rate));
 }