diff --git a/src/node_api.cc b/src/node_api.cc
index b456ade2d4ca74..fb3ea5df2ce006 100644
--- a/src/node_api.cc
+++ b/src/node_api.cc
@@ -3377,7 +3377,7 @@ class Work : public node::AsyncResource, public node::ThreadPoolWork {
     _execute(_env, _data);
   }
 
-  void AfterThreadPoolWork(int status) {
+  void AfterThreadPoolWork(int status) override {
     if (_complete == nullptr)
       return;
 
diff --git a/src/node_zlib.cc b/src/node_zlib.cc
index c77e6d3297df5d..ac5083862de4e3 100644
--- a/src/node_zlib.cc
+++ b/src/node_zlib.cc
@@ -217,11 +217,11 @@ class ZCtx : public AsyncWrap, public ThreadPoolWork {
 
   // TODO(addaleax): Make these methods non-static. It's a significant bunch
   // of churn that's better left for a separate PR.
-  void DoThreadPoolWork() {
+  void DoThreadPoolWork() override {
     Process(this);
   }
 
-  void AfterThreadPoolWork(int status) {
+  void AfterThreadPoolWork(int status) override {
     After(this, status);
   }