diff --git a/tensorflow/lite/kernels/fully_connected_test.cc b/tensorflow/lite/kernels/fully_connected_test.cc
index 7a69b999f1f..1e1697d5728 100644
--- a/tensorflow/lite/kernels/fully_connected_test.cc
+++ b/tensorflow/lite/kernels/fully_connected_test.cc
@@ -142,7 +142,7 @@ class BaseFullyConnectedOpModel : public SingleOpModel {
           FullyConnectedOptionsWeightsFormat_DEFAULT)
       : batches_(batches), units_(units) {
     int total_input_size = 1;
-    for (int i = 0; i < input.shape.size(); ++i) {
+    for (size_t i = 0; i < input.shape.size(); ++i) {
       total_input_size *= input.shape[i];
     }
     input_size_ = total_input_size / batches_;
@@ -278,7 +278,7 @@ class HybridFullyConnectedOpModel : public SingleOpModel {
                               const TensorData& output = {TensorType_FLOAT32})
       : batches_(batches), units_(units) {
     int total_input_size = 1;
-    for (int i = 0; i < input.shape.size(); ++i) {
+    for (size_t i = 0; i < input.shape.size(); ++i) {
       total_input_size *= input.shape[i];
     }
     input_size_ = total_input_size / batches_;