diff --git a/ortools/base/threadpool.cc b/ortools/base/threadpool.cc
index 0da27868ba8..e82c9c569b9 100644
--- a/ortools/base/threadpool.cc
+++ b/ortools/base/threadpool.cc
@@ -14,7 +14,6 @@
 #include "ortools/base/threadpool.h"
 
 #include "absl/log/check.h"
-#include "ortools/base/callback.h"
 
 namespace operations_research {
 void RunWorker(void* data) {
@@ -88,9 +87,4 @@ void ThreadPool::Schedule(std::function<void()> closure) {
   }
 }
 
-void ThreadPool::Add(Closure* closure) {
-  assert(closure != nullptr);
-  Schedule([closure] { closure->Run(); });
-}
-
 }  // namespace operations_research
diff --git a/ortools/base/threadpool.h b/ortools/base/threadpool.h
index 597e033e99e..7595afed6ba 100644
--- a/ortools/base/threadpool.h
+++ b/ortools/base/threadpool.h
@@ -22,8 +22,6 @@
 #include <thread>  // NOLINT
 #include <vector>
 
-#include "ortools/base/callback.h"
-
 namespace operations_research {
 class ThreadPool {
  public:
@@ -34,7 +32,6 @@ class ThreadPool {
   void Schedule(std::function<void()> closure);
   std::function<void()> GetNextTask();
   void SetQueueCapacity(int capacity);
-  void Add(Closure* closure);
 
  private:
   const int num_workers_;