diff --git a/ww/eventloop/event/hevent.c b/ww/eventloop/event/hevent.c
index 49d7d11..b22641c 100644
--- a/ww/eventloop/event/hevent.c
+++ b/ww/eventloop/event/hevent.c
@@ -480,7 +480,7 @@ void hio_set_write_timeout(hio_t* io, int timeout_ms) {
 
 static void __keepalive_timeout_cb(htimer_t* timer) {
     hio_t* io = (hio_t*)timer->privdata;
-    uint64_t last_rw_hrtime = MAX(io->last_read_hrtime, io->last_write_hrtime);
+    uint64_t last_rw_hrtime = max(io->last_read_hrtime, io->last_write_hrtime);
     uint64_t inactive_ms = (io->loop->cur_hrtime - last_rw_hrtime) / 1000;
     if (inactive_ms + 100 < (uint64_t)io->keepalive_timeout) {
         htimer_reset(io->keepalive_timer, io->keepalive_timeout - inactive_ms);
diff --git a/ww/eventloop/event/hloop.c b/ww/eventloop/event/hloop.c
index c6f7529..3ee62e7 100644
--- a/ww/eventloop/event/hloop.c
+++ b/ww/eventloop/event/hloop.c
@@ -148,15 +148,15 @@ int hloop_process_events(hloop_t* loop, int timeout_ms) {
         int64_t blocktime_us = blocktime_ms * 1000;
         if (loop->timers.root) {
             int64_t min_timeout = TIMER_ENTRY(loop->timers.root)->next_timeout - loop->cur_hrtime;
-            blocktime_us = MIN(blocktime_us, min_timeout);
+            blocktime_us = min(blocktime_us, min_timeout);
         }
         if (loop->realtimers.root) {
             int64_t min_timeout = TIMER_ENTRY(loop->realtimers.root)->next_timeout - hloop_now_us(loop);
-            blocktime_us = MIN(blocktime_us, min_timeout);
+            blocktime_us = min(blocktime_us, min_timeout);
         }
         if (blocktime_us < 0) goto process_timers;
         blocktime_ms = blocktime_us / 1000 + 1;
-        blocktime_ms = MIN(blocktime_ms, timeout_ms);
+        blocktime_ms = min(blocktime_ms, timeout_ms);
     }
 
     if (loop->nios) {
@@ -717,7 +717,7 @@ const char* hio_engine(void) {
 static inline hio_t* __hio_get(hloop_t* loop, int fd) {
     if (fd >= (int)loop->ios.maxsize) {
         int newsize = ceil2e(fd);
-        newsize = MAX(newsize, IO_ARRAY_INIT_SIZE);
+        newsize = max(newsize, IO_ARRAY_INIT_SIZE);
         io_array_resize(&loop->ios, newsize > fd ? newsize : 2 * fd);
     }
     return loop->ios.ptr[fd];
diff --git a/ww/eventloop/event/hloop.h b/ww/eventloop/event/hloop.h
index 4e8b440..47e3536 100644
--- a/ww/eventloop/event/hloop.h
+++ b/ww/eventloop/event/hloop.h
@@ -4,6 +4,7 @@
 #include "hexport.h"
 #include "hplatform.h"
 #include "hdef.h"
+#include "utils/mathutils.h"
 #include "buffer_pool.h"
 
 typedef struct hloop_s hloop_t;
@@ -471,8 +472,8 @@ HV_INLINE uint32_t reconn_setting_calc_delay(reconn_setting_t* reconn) {
         // exponential
         reconn->cur_delay *= reconn->delay_policy;
     }
-    reconn->cur_delay = MAX(reconn->cur_delay, reconn->min_delay);
-    reconn->cur_delay = MIN(reconn->cur_delay, reconn->max_delay);
+    reconn->cur_delay = max(reconn->cur_delay, reconn->min_delay);
+    reconn->cur_delay = min(reconn->cur_delay, reconn->max_delay);
     return reconn->cur_delay;
 }