diff --git a/llvm/include/llvm/Support/ThreadPool.h b/llvm/include/llvm/Support/ThreadPool.h
index 1be7779f2c72c..4f91455f204fd 100644
--- a/llvm/include/llvm/Support/ThreadPool.h
+++ b/llvm/include/llvm/Support/ThreadPool.h
@@ -225,6 +225,12 @@ class LLVM_ABI SingleThreadExecutor : public ThreadPoolInterface {
   /// Blocking destructor: the pool will first execute the pending tasks.
   ~SingleThreadExecutor() override;
 
+  // Excplicitly disable copy. This is necessary for the MSVC LLVM_DYLIB build
+  // because MSVC tries to generate copy constructor and assignment operator
+  // for classes marked with `__declspec(dllexport)`.
+  SingleThreadExecutor(const SingleThreadExecutor &) = delete;
+  SingleThreadExecutor &operator=(const SingleThreadExecutor &) = delete;
+
   /// Blocking wait for all the tasks to execute first
   void wait() override;