diff --git a/src/brpc/reloadable_flags.h b/src/brpc/reloadable_flags.h
index dabd86b5a8..60b7851f4b 100644
--- a/src/brpc/reloadable_flags.h
+++ b/src/brpc/reloadable_flags.h
@@ -21,6 +21,8 @@
 
 #include "butil/reloadable_flags.h"
 
+#define BRPC_VALIDATE_GFLAG(flag, validate_fn) BUTIL_VALIDATE_GFLAG(flag, validate_fn)
+
 namespace brpc {
 
 extern bool PassValidate(const char*, bool);
diff --git a/src/bthread/bthread.h b/src/bthread/bthread.h
index 5055cb237b..f0a8e9754c 100644
--- a/src/bthread/bthread.h
+++ b/src/bthread/bthread.h
@@ -35,8 +35,6 @@
 #include "bthread/id.h"
 
 #if defined(__cplusplus) && defined(BRPC_BTHREAD_TRACER)
-#include "butil/resource_pool.h"
-#include "bthread/task_meta.h"
 namespace bthread {
 // Assign a TaskMeta to the pthread and set the state to Running,
 // so that `stack_trace()' can trace the call stack of the pthread.
diff --git a/src/bthread/task_tracer.cpp b/src/bthread/task_tracer.cpp
index aacc433770..acdf920891 100644
--- a/src/bthread/task_tracer.cpp
+++ b/src/bthread/task_tracer.cpp
@@ -31,7 +31,7 @@ namespace bthread {
 
 DEFINE_bool(enable_fast_unwind, true, "Whether to enable fast unwind");
 DEFINE_uint32(signal_trace_timeout_ms, 50, "Timeout for signal trace in ms");
-BRPC_VALIDATE_GFLAG(signal_trace_timeout_ms, butil::PositiveInteger<uint32_t>);
+BUTIL_VALIDATE_GFLAG(signal_trace_timeout_ms, butil::PositiveInteger<uint32_t>);
 
 extern BAIDU_THREAD_LOCAL TaskMeta* pthread_fake_meta;
 
diff --git a/src/butil/reloadable_flags.h b/src/butil/reloadable_flags.h
index 9bb62d82f1..2cb11e9253 100644
--- a/src/butil/reloadable_flags.h
+++ b/src/butil/reloadable_flags.h
@@ -35,7 +35,7 @@
 // This macro does not work for string-flags because they're thread-unsafe to
 // modify directly. To emphasize this, you have to write the validator by
 // yourself and use GFLAGS_NS::GetCommandLineOption() to acess the flag.
-#define BRPC_VALIDATE_GFLAG(flag, validate_fn)                     \
+#define BUTIL_VALIDATE_GFLAG(flag, validate_fn)                     \
     namespace butil_flags {}                                       \
     const int register_FLAGS_ ## flag ## _dummy                    \
                  __attribute__((__unused__)) =                     \
diff --git a/src/butil/time.h b/src/butil/time.h
index 005f551b1c..61602ab52b 100644
--- a/src/butil/time.h
+++ b/src/butil/time.h
@@ -376,7 +376,7 @@ class Timer {
     };
 
     Timer() : _stop(0), _start(0) {}
-    explicit Timer(const TimerType) {
+    explicit Timer(const TimerType) : Timer() {
         start();
     }