diff --git a/kitty/prewarm.py b/kitty/prewarm.py
index 8b44e17e8..c7bc5b04e 100644
--- a/kitty/prewarm.py
+++ b/kitty/prewarm.py
@@ -48,32 +48,18 @@ class Child:
     child_process_pid: int
 
 
-if hasattr(os, 'waitid'):
-    def wait_for_child_death(child_pid: int, timeout: float = 1) -> Optional[int]:
-        st = time.monotonic()
-        while time.monotonic() - st < timeout:
-            try:
-                x = os.waitid(os.P_PID, child_pid, os.WEXITED | os.WNOHANG)
-            except ChildProcessError:
-                return 0
-            else:
-                if x is not None and x.si_pid == child_pid:
-                    return x.si_status
-            time.sleep(0.01)
-        return None
-else:
-    def wait_for_child_death(child_pid: int, timeout: float = 1) -> Optional[int]:
-        st = time.monotonic()
-        while time.monotonic() - st < timeout:
-            try:
-                pid, status = os.waitpid(child_pid, os.WNOHANG)
-            except ChildProcessError:
-                return 0
-            else:
-                if pid == child_pid:
-                    return status
-            time.sleep(0.01)
-        return None
+def wait_for_child_death(child_pid: int, timeout: float = 1) -> Optional[int]:
+    st = time.monotonic()
+    while time.monotonic() - st < timeout:
+        try:
+            pid, status = os.waitpid(child_pid, os.WNOHANG)
+        except ChildProcessError:
+            return 0
+        else:
+            if pid == child_pid:
+                return status
+        time.sleep(0.01)
+    return None
 
 
 class PrewarmProcess: