diff --git a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml
index 0f193fda0470fd7ab2c6811914b1caf1196c5485..6f529e100ea49f25d7d438156abf74105a4be352 100644
--- a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml
@@ -6,7 +6,7 @@
 
   <refnamediv>
     <refname>VIDIOC_REQBUFS</refname>
-    <refpurpose>Initiate Memory Mapping or User Pointer I/O</refpurpose>
+    <refpurpose>Initiate Memory Mapping, User Pointer or DMA Buffer I/O</refpurpose>
   </refnamediv>
 
   <refsynopsisdiv>