diff --git a/man2/chroot.2 b/man2/chroot.2
index 1f210e7d1..209847b42 100644
--- a/man2/chroot.2
+++ b/man2/chroot.2
@@ -50,11 +50,9 @@ Feature Test Macro Requirements for glibc (see
 .TP 4
 Since glibc 2.2.2:
 .nf
-_BSD_SOURCE ||
-    (_XOPEN_SOURCE\ >=\ 500) &&
-.\"    (_XOPEN_SOURCE\ >=\ 500 &&
-.\"        || _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED) &&
-    ! (_POSIX_C_SOURCE\ >=\ 200112L)
+_XOPEN_SOURCE && ! (_POSIX_C_SOURCE\ >=\ 200112L)
+    || /* Since glibc 2.20: */ _DEFAULT_SOURCE
+    || /* Glibc versions <= 2.19: */ _BSD_SOURCE
 .TP 4
 .fi
 Before glibc 2.2.2: none