diff --git a/libc/stdio/lib_lowinstream.c b/libc/stdio/lib_lowinstream.c
index 8964b56749d..ad3231784d5 100644
--- a/libc/stdio/lib_lowinstream.c
+++ b/libc/stdio/lib_lowinstream.c
@@ -85,8 +85,8 @@ static int lowinstream_getc(FAR struct lib_instream_s *this)
  *   Initializes a stream for use with low-level, architecture-specific I/O.
  *
  * Input parameters:
- *   lowoutstream - User allocated, uninitialized instance of struct
- *                  lib_lowoutstream_s to be initialized.
+ *   stream - User allocated, uninitialized instance of struct
+ *           lib_lowinstream_s to be initialized.
  *
  * Returned Value:
  *   None (User allocated instance initialized).
diff --git a/libc/stdio/lib_lowoutstream.c b/libc/stdio/lib_lowoutstream.c
index 91604c90c49..788f3f18146 100644
--- a/libc/stdio/lib_lowoutstream.c
+++ b/libc/stdio/lib_lowoutstream.c
@@ -77,8 +77,8 @@ static void lowoutstream_putc(FAR struct lib_outstream_s *this, int ch)
  *   Initializes a stream for use with low-level, architecture-specific I/O.
  *
  * Input parameters:
- *   lowoutstream - User allocated, uninitialized instance of struct
- *                  lib_lowoutstream_s to be initialized.
+ *   stream - User allocated, uninitialized instance of struct
+ *            lib_lowoutstream_s to be initialized.
  *
  * Returned Value:
  *   None (User allocated instance initialized).