diff --git a/docs/design/draft-keyframe-force.txt b/docs/design/draft-keyframe-force.txt
index c1d408a03f..8dd0f012e5 100644
--- a/docs/design/draft-keyframe-force.txt
+++ b/docs/design/draft-keyframe-force.txt
@@ -50,6 +50,10 @@ Implementation:
 	                                 event.
 	 (G_TYPE_UINT64)"running-time" : the running time of the stream when the 
 	                                 event was triggered.
+	 (G_TYPE_BOOLEAN)"all-headers" : Send all headers, including those in
+                                         the caps or those sent at the start of
+                                         the stream.
+
 	 ....                          : optional other data fields.
 
   Note that this event is purely informational, no element is required to