diff --git a/src/node_report_utils.cc b/src/node_report_utils.cc
index 5013fd7a875216..81fdeda0405ea4 100644
--- a/src/node_report_utils.cc
+++ b/src/node_report_utils.cc
@@ -192,15 +192,17 @@ void WalkHandle(uv_handle_t* h, void* arg) {
     if (rc == 0) {
       writer->json_keyvalue("fd", static_cast<int>(fd_v));
       switch (fd_v) {
-        case 0:
+        case STDIN_FILENO:
           writer->json_keyvalue("stdio", "stdin");
           break;
-        case 1:
+        case STDOUT_FILENO:
           writer->json_keyvalue("stdio", "stdout");
           break;
-        case 2:
+        case STDERR_FILENO:
           writer->json_keyvalue("stdio", "stderr");
           break;
+        default:
+          break;
       }
     }
   }
@@ -231,7 +233,7 @@ std::string EscapeJsonChars(const std::string& str) {
       "\\u001a", "\\u001b", "\\u001c", "\\u001d", "\\u001e", "\\u001f"
   };
 
-  std::string ret = "";
+  std::string ret;
   size_t last_pos = 0;
   size_t pos = 0;
   for (; pos < str.size(); ++pos) {