diff --git a/posix/wait3.c b/posix/wait3.c
index 6b6e3a500d..f0abf24e31 100644
--- a/posix/wait3.c
+++ b/posix/wait3.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
+/* Wait for process to change state.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -15,7 +16,6 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
 #include <sys/wait.h>
 #include <sys/types.h>
 
@@ -27,15 +27,7 @@
 pid_t
 __wait3 (int *stat_loc, int options, struct rusage *usage)
 {
-  if ((options & ~(WNOHANG|WUNTRACED)) != 0)
-    {
-      __set_errno (EINVAL);
-      return (pid_t) -1;
-    }
-
-  __set_errno (ENOSYS);
-  return (pid_t) -1;
+  return __wait4 (WAIT_ANY, stat_loc, options, usage);
 }
-stub_warning (wait3)
 
 weak_alias (__wait3, wait3)
diff --git a/sysdeps/posix/wait3.c b/sysdeps/posix/wait3.c
deleted file mode 100644
index daba36c6dc..0000000000
--- a/sysdeps/posix/wait3.c
+++ /dev/null
@@ -1,39 +0,0 @@
-/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <errno.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <stddef.h>
-
-/* Wait for a child to exit.  When one does, put its status in *STAT_LOC and
-   return its process ID.  For errors return (pid_t) -1.  If USAGE is not nil,
-   store information about the child's resource usage (as a `struct rusage')
-   there.  If the WUNTRACED bit is set in OPTIONS, return status for stopped
-   children; otherwise don't.  */
-pid_t
-__wait3 (int *stat_loc, int options, struct rusage *usage)
-{
-  if (usage != NULL)
-    {
-      __set_errno (ENOSYS);
-      return (pid_t) -1;
-    }
-  return __waitpid (WAIT_ANY, stat_loc, options);
-}
-
-weak_alias (__wait3, wait3)
diff --git a/sysdeps/unix/bsd/wait3.c b/sysdeps/unix/bsd/wait3.c
deleted file mode 100644
index d7fa7e4496..0000000000
--- a/sysdeps/unix/bsd/wait3.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <errno.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-
-/* Wait for a child to exit.  When one does, put its status in *STAT_LOC and
-   return its process ID.  For errors return (pid_t) -1.  If USAGE is not nil,
-   store information about the child's resource usage (as a `struct rusage')
-   there.  If the WUNTRACED bit is set in OPTIONS, return status for stopped
-   children; otherwise don't.  */
-pid_t
-__wait3 (int *stat_loc, int options, struct rusage *usage)
-{
-  return __wait4 (WAIT_ANY, stat_loc, options, usage);
-}
-
-weak_alias (__wait3, wait3)
diff --git a/sysdeps/unix/sysv/linux/wait3.c b/sysdeps/unix/sysv/linux/wait3.c
deleted file mode 100644
index 2ff027f0e1..0000000000
--- a/sysdeps/unix/sysv/linux/wait3.c
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/unix/bsd/wait3.c>
