diff --git a/onnxruntime/core/providers/coreml/model/model.mm b/onnxruntime/core/providers/coreml/model/model.mm
index cbee7975b2525..87b438e8c30ee 100644
--- a/onnxruntime/core/providers/coreml/model/model.mm
+++ b/onnxruntime/core/providers/coreml/model/model.mm
@@ -174,7 +174,7 @@ bool IsArrayContiguous(MLMultiArray* array) {
   int64_t batch_stride = [array.strides[0] longLongValue];
   const auto* shape = array.shape;
   int64_t batch_elems = 1;
-  for (int i = 1; i < [shape count]; i++) batch_elems *= [shape[i] longLongValue];
+  for (unsigned long i = 1; i < shape.count; i++) batch_elems *= [shape[i] longLongValue];
   return batch_stride == batch_elems;
 }
 }  // namespace
@@ -335,7 +335,7 @@ - (Status)predict:(const std::unordered_map<std::string, OnnxTensorData>&)inputs
         ORT_RETURN_IF_NOT(IsArrayContiguous(data),
                           "Non-contiguous output MLMultiArray is not currently supported");
         __block const void* model_output_buffer = nil;
-        __block int64_t coreml_buffer_size = 0;
+        __block unsigned long coreml_buffer_size = 0;
         [data getBytesWithHandler:^(const void* bytes, NSInteger size) {
           model_output_buffer = bytes;
           coreml_buffer_size = size;