diff --git a/libavcodec/dovi_rpu.h b/libavcodec/dovi_rpu.h
index bfb118d6b5..205d16ffbc 100644
--- a/libavcodec/dovi_rpu.h
+++ b/libavcodec/dovi_rpu.h
@@ -95,8 +95,9 @@ void ff_dovi_ctx_unref(DOVIContext *s);
 void ff_dovi_ctx_flush(DOVIContext *s);
 
 /**
- * Parse the contents of a Dovi RPU NAL and update the parsed values in the
- * DOVIContext struct.
+ * Parse the contents of a Dolby Vision RPU and update the parsed values in the
+ * DOVIContext struct. This function should receive the decoded unit payload,
+ * without any T.35 or NAL unit headers.
  *
  * Returns 0 or an error code.
  *
diff --git a/libavcodec/dovi_rpudec.c b/libavcodec/dovi_rpudec.c
index c025800206..375e6e560b 100644
--- a/libavcodec/dovi_rpudec.c
+++ b/libavcodec/dovi_rpudec.c
@@ -360,7 +360,7 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
         emdf_protection = get_bits(gb, 5 + 12);
         VALIDATE(emdf_protection, 0x400, 0x400);
     } else {
-        /* NAL RBSP with prefix and trailing zeroes */
+        /* NAL unit with prefix and trailing zeroes */
         VALIDATE(rpu[0], 25, 25); /* NAL prefix */
         rpu++;
         rpu_size--;