diff --git a/ChangeLog b/ChangeLog
index 4050ec4e53..b9c30106a6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-12-23  Dmitry V. Levin  <ldv@altlinux.org>
+
+	[BZ #22347]
+	* stdlib/getrandom.c (getrandom): Fix comment.
+	* sysdeps/unix/sysv/linux/getrandom.c (getrandom): Likewise.
+
 2017-12-23  Aurelien Jarno <aurelien@aurel32.net>
 
 	[BZ #21161]
diff --git a/stdlib/getrandom.c b/stdlib/getrandom.c
index b2a83c2db7..268b0e43a0 100644
--- a/stdlib/getrandom.c
+++ b/stdlib/getrandom.c
@@ -19,8 +19,8 @@
 #include <sys/random.h>
 #include <errno.h>
 
-/* Write LENGTH bytes of randomness starting at BUFFER.  Return the
-   number of bytes written, or -1 on error.  */
+/* Write up to LENGTH bytes of randomness starting at BUFFER.
+   Return the number of bytes written, or -1 on error.  */
 ssize_t
 getrandom (void *buffer, size_t length, unsigned int flags)
 {
diff --git a/sysdeps/unix/sysv/linux/getrandom.c b/sysdeps/unix/sysv/linux/getrandom.c
index 25eb6efdd6..31b0e4e79e 100644
--- a/sysdeps/unix/sysv/linux/getrandom.c
+++ b/sysdeps/unix/sysv/linux/getrandom.c
@@ -22,8 +22,8 @@
 #include <sysdep-cancel.h>
 
 #ifdef __NR_getrandom
-/* Write LENGTH bytes of randomness starting at BUFFER.  Return 0 on
-   success and -1 on failure.  */
+/* Write up to LENGTH bytes of randomness starting at BUFFER.
+   Return the number of bytes written, or -1 on error.  */
 ssize_t
 getrandom (void *buffer, size_t length, unsigned int flags)
 {