diff --git a/src/env-inl.h b/src/env-inl.h
index bbb80c6f7ae916..8b878431ac65a3 100644
--- a/src/env-inl.h
+++ b/src/env-inl.h
@@ -33,6 +33,7 @@
 #include "node_perf_common.h"
 #include "node_context_data.h"
 #include "tracing/agent.h"
+#include "node_worker.h"
 
 #include <stddef.h>
 #include <stdint.h>
@@ -623,6 +624,11 @@ inline void Environment::remove_sub_worker_context(worker::Worker* context) {
   sub_worker_contexts_.erase(context);
 }
 
+inline bool Environment::is_stopping_worker() const {
+  CHECK(!is_main_thread());
+  return worker_context_->is_stopped();
+}
+
 inline performance::performance_state* Environment::performance_state() {
   return performance_state_.get();
 }
diff --git a/src/env.cc b/src/env.cc
index 2236893dd77923..6c906e2fb19c56 100644
--- a/src/env.cc
+++ b/src/env.cc
@@ -653,9 +653,4 @@ void Environment::stop_sub_worker_contexts() {
   }
 }
 
-bool Environment::is_stopping_worker() const {
-  CHECK(!is_main_thread());
-  return worker_context_->is_stopped();
-}
-
 }  // namespace node
diff --git a/src/env.h b/src/env.h
index c7e75004bf0ceb..38be74542b2599 100644
--- a/src/env.h
+++ b/src/env.h
@@ -723,9 +723,6 @@ class Environment {
   inline bool can_call_into_js() const;
   inline void set_can_call_into_js(bool can_call_into_js);
 
-  // TODO(addaleax): This should be inline.
-  bool is_stopping_worker() const;
-
   inline bool is_main_thread() const;
   inline uint64_t thread_id() const;
   inline void set_thread_id(uint64_t id);
@@ -734,6 +731,7 @@ class Environment {
   inline void add_sub_worker_context(worker::Worker* context);
   inline void remove_sub_worker_context(worker::Worker* context);
   void stop_sub_worker_contexts();
+  inline bool is_stopping_worker() const;
 
   inline void ThrowError(const char* errmsg);
   inline void ThrowTypeError(const char* errmsg);