diff --git a/src/core/lib/gprpp/thd_posix.cc b/src/core/lib/gprpp/thd_posix.cc
index a4f35be4bc97c..11cbd926f1ed6 100644
--- a/src/core/lib/gprpp/thd_posix.cc
+++ b/src/core/lib/gprpp/thd_posix.cc
@@ -26,6 +26,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <stdio.h>
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
diff --git a/src/cpp/thread_manager/thread_manager.h b/src/cpp/thread_manager/thread_manager.h
index 81b18dbb71edf..b387639eaba77 100644
--- a/src/cpp/thread_manager/thread_manager.h
+++ b/src/cpp/thread_manager/thread_manager.h
@@ -120,8 +120,8 @@ class ThreadManager {
   // not be called (and the need for this WorkerThread class is eliminated)
   class WorkerThread {
    public:
-    explicit WorkerThread(ThreadManager* thd_mgr,
-                          const std::size_t stack_size_limit = 0);
+    WorkerThread(ThreadManager* thd_mgr,
+                 const std::size_t stack_size_limit = 0);
     ~WorkerThread();
 
     bool created() const { return created_; }