diff --git a/src/inspector/worker_agent.cc b/src/inspector/worker_agent.cc
index fccd6d57a53c2a..d343de8494a36f 100644
--- a/src/inspector/worker_agent.cc
+++ b/src/inspector/worker_agent.cc
@@ -2,6 +2,7 @@
 
 #include "main_thread_interface.h"
 #include "worker_inspector.h"
+#include "util-inl.h"
 
 namespace node {
 namespace inspector {
diff --git a/src/node_os.cc b/src/node_os.cc
index d3e9460f473122..6e209b2ceec71c 100644
--- a/src/node_os.cc
+++ b/src/node_os.cc
@@ -168,7 +168,7 @@ static void GetCPUInfo(const FunctionCallbackInfo<Value>& args) {
   Local<Array> cpus = args[2].As<Array>();
 
   Local<Value> model_argv[NODE_PUSH_VAL_TO_ARRAY_MAX];
-  int model_idx = 0;
+  unsigned int model_idx = 0;
 
   for (i = 0, field_idx = 0; i < count; i++) {
     uv_cpu_info_t* ci = cpu_infos + i;
diff --git a/src/node_trace_events.cc b/src/node_trace_events.cc
index ce60cde2d0d433..5269ad332ed151 100644
--- a/src/node_trace_events.cc
+++ b/src/node_trace_events.cc
@@ -62,7 +62,6 @@ void NodeCategorySet::New(const FunctionCallbackInfo<Value>& args) {
 }
 
 void NodeCategorySet::Enable(const FunctionCallbackInfo<Value>& args) {
-  Environment* env = Environment::GetCurrent(args);
   NodeCategorySet* category_set;
   ASSIGN_OR_RETURN_UNWRAP(&category_set, args.Holder());
   CHECK_NOT_NULL(category_set);
@@ -74,7 +73,6 @@ void NodeCategorySet::Enable(const FunctionCallbackInfo<Value>& args) {
 }
 
 void NodeCategorySet::Disable(const FunctionCallbackInfo<Value>& args) {
-  Environment* env = Environment::GetCurrent(args);
   NodeCategorySet* category_set;
   ASSIGN_OR_RETURN_UNWRAP(&category_set, args.Holder());
   CHECK_NOT_NULL(category_set);