--- IO-AIO/AIO.xs	2020/12/29 15:25:26	1.286
+++ IO-AIO/AIO.xs	2020/12/29 15:28:02	1.287
@@ -86,6 +86,7 @@
 
   #include <sys/time.h>
   #include <sys/select.h>
+  #include <sys/wait.h>
   #include <unistd.h>
   #include <utime.h>
   #include <signal.h>
@@ -1366,6 +1367,12 @@
     const_iv (MOVE_MOUNT_T_AUTOMOUNTS)
     const_iv (MOVE_MOUNT_T_EMPTY_PATH)
 
+    /* waitid */
+    const_iv (P_PID)
+    const_iv (P_PIDFD)
+    const_iv (P_PGID)
+    const_iv (P_ALL)
+
     /* these are libeio constants, and are independent of gendef0 */
     const_eio (SEEK_SET)
     const_eio (SEEK_CUR)