diff --git a/src/core/reactor.cc b/src/core/reactor.cc
index 0831a75bd5..27902d1d0d 100644
--- a/src/core/reactor.cc
+++ b/src/core/reactor.cc
@@ -3007,7 +3007,7 @@ reactor::wakeup() {
     _sleeping.store(false, std::memory_order_relaxed);
 
     uint64_t one = 1;
-    ::write(_notify_eventfd.get(), &one, sizeof(one));
+    (void)::write(_notify_eventfd.get(), &one, sizeof(one));
 }
 
 void reactor::start_aio_eventfd_loop() {
@@ -3017,7 +3017,7 @@ void reactor::start_aio_eventfd_loop() {
     future<> loop_done = repeat([this] {
         return _aio_eventfd->readable().then([this] {
             char garbage[8];
-            ::read(_aio_eventfd->get_fd(), garbage, 8); // totally uninteresting
+            (void)::read(_aio_eventfd->get_fd(), garbage, 8); // totally uninteresting
             return _stopping ? stop_iteration::yes : stop_iteration::no;
         });
     });
@@ -3032,7 +3032,7 @@ void reactor::stop_aio_eventfd_loop() {
         return;
     }
     uint64_t one = 1;
-    ::write(_aio_eventfd->get_fd(), &one, 8);
+    (void)::write(_aio_eventfd->get_fd(), &one, 8);
 }
 
 inline
diff --git a/src/core/thread_pool.cc b/src/core/thread_pool.cc
index c88f0f53db..13c0b3e375 100644
--- a/src/core/thread_pool.cc
+++ b/src/core/thread_pool.cc
@@ -66,7 +66,7 @@ void thread_pool::work(sstring name) {
             std::atomic_thread_fence(std::memory_order_seq_cst);
             if (_main_thread_idle.load(std::memory_order_relaxed)) {
                 uint64_t one = 1;
-                ::write(_reactor._notify_eventfd.get(), &one, 8);
+                (void)::write(_reactor._notify_eventfd.get(), &one, 8);
             }
         }
     }
diff --git a/tests/perf/linux_perf_event.cc b/tests/perf/linux_perf_event.cc
index 16c06bb6a4..36249715b7 100644
--- a/tests/perf/linux_perf_event.cc
+++ b/tests/perf/linux_perf_event.cc
@@ -61,7 +61,7 @@ linux_perf_event::read() {
         return 0;
     }
     uint64_t ret;
-    ::read(_fd, &ret, sizeof(ret));
+    (void)::read(_fd, &ret, sizeof(ret));
     return ret;
 }