1 files changed, 4 insertions, 2 deletions
diff --git a/man3/malloc.3 b/man3/malloc.3
index 1e8a76e2e9..a74b94e567 100644
--- a/man3/malloc.3
+++ b/man3/malloc.3
@@ -50,11 +50,13 @@ Feature Test Macro Requirements for glibc (see
 .in
 .PP
 .BR reallocarray ():
-.br
-.RS 4
 .ad l
 _GNU_SOURCE
 .RE
+    Since glibc 2.29:
+        _DEFAULT_SOURCE
+    Glibc 2.28 and earlier:
+        _GNU_SOURCE
 .ad
 .SH DESCRIPTION
 .PP