diff --git a/onnxruntime/core/framework/node_index_info.cc b/onnxruntime/core/framework/node_index_info.cc
index 4063d0104f..502568f41c 100644
--- a/onnxruntime/core/framework/node_index_info.cc
+++ b/onnxruntime/core/framework/node_index_info.cc
@@ -32,7 +32,8 @@ static void FindMinAndMaxNodeIndex(const TValidNodes& nodes, NodeIndex& min, Nod
   std::for_each(nodes.cbegin(), nodes.cend(), [&min, &max](const Node& node) {
     auto idx = node.Index();
     if (idx > max) max = idx;
-    if (idx >= 0 && idx < min) min = idx;
+    //NodeIndex is size_t type
+    if (idx < min) min = idx;
   });
 
   // match GraphViewer::MaxNodeIndex() which returns nodes_.size(), so is actually the max used value + 1.
diff --git a/onnxruntime/core/providers/cpu/tensor/scatter_nd.cc b/onnxruntime/core/providers/cpu/tensor/scatter_nd.cc
index 9b1b173c43..d703568549 100644
--- a/onnxruntime/core/providers/cpu/tensor/scatter_nd.cc
+++ b/onnxruntime/core/providers/cpu/tensor/scatter_nd.cc
@@ -45,8 +45,8 @@ Status ScatterNDBase::PrepareForCompute(OpKernelContext* context, Prepare& p) co
     if (update_rank < indice_rank - 1) {
       return true;
     }
-    if ((update_rank >= indice_rank - 1) &&
-        (indice_rank - 1 >= 0) &&
+    if (update_rank >= indice_rank - 1 &&
+        indice_rank >= 1 &&
         (indice_shape.Slice(0, indice_rank - 1) != update_shape.Slice(0, indice_rank - 1))) {
       return true;
     }
@@ -154,4 +154,4 @@ Status ScatterND::ScatterString(const Prepare& p, concurrency::ThreadPool* tp) c
   return Status::OK();
 }
 
-}  // namespace onnxruntime
\ No newline at end of file
+}  // namespace onnxruntime