diff --git a/man2/copy_file_range.2 b/man2/copy_file_range.2
index c0f1af4b4..4a91c4b7e 100644
--- a/man2/copy_file_range.2
+++ b/man2/copy_file_range.2
@@ -125,6 +125,7 @@ are not on the same mounted filesystem.
 The
 .BR copy_file_range ()
 system call first appeared in Linux 4.5.
+Library support was added in glibc 2.27.
 .SH CONFORMING TO
 The
 .BR copy_file_range ()