diff --git a/ext/-test-/scheduler/scheduler.c b/ext/-test-/scheduler/scheduler.c
index f8384f597e..b742a5573b 100644
--- a/ext/-test-/scheduler/scheduler.c
+++ b/ext/-test-/scheduler/scheduler.c
@@ -41,7 +41,8 @@ blocking_operation(void *argument)
 {
     struct blocking_state *blocking_state = (struct blocking_state *)argument;
 
-    write(blocking_state->notify_descriptor, "x", 1);
+    ssize_t ret = write(blocking_state->notify_descriptor, "x", 1);
+    (void)ret; // ignore the result for now
 
     while (!blocking_state->interrupted) {
         struct timeval tv = {1, 0};  // 1 second timeout.