diff --git a/kernel/include/sortix/__/wait.h b/kernel/include/sortix/__/wait.h
index 7c324a58..b9d38232 100644
--- a/kernel/include/sortix/__/wait.h
+++ b/kernel/include/sortix/__/wait.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2014, 2024 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -42,6 +42,8 @@ extern "C" {
 
 #define __WSTOPSIG(status) __WTERMSIG(status)
 
+#define __WCOREDUMP(status) ((status) & 0)
+
 #define __WCONSTRUCT(nature, exitcode, signal) \
         (((nature) & 0xFF) << 16 | \
          ((exitcode) & 0xFF) << 8 | \
diff --git a/kernel/include/sortix/wait.h b/kernel/include/sortix/wait.h
index 9b2a0b09..16aaf003 100644
--- a/kernel/include/sortix/wait.h
+++ b/kernel/include/sortix/wait.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2014 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2012, 2014, 2024 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -48,6 +48,8 @@ extern "C" {
 
 #define WSTOPSIG(status) __WSTOPSIG(status)
 
+#define WCOREDUMP(status) __WCOREDUMP(status)
+
 #define WCONSTRUCT(nature, exitcode, signal) \
         __WCONSTRUCT(nature, exitcode, signal)