diff --git a/apps/aomenc.c b/apps/aomenc.c
index 8d9c76c..19a4524 100644
--- a/apps/aomenc.c
+++ b/apps/aomenc.c
@@ -430,8 +430,9 @@
 static const arg_def_t enable_keyframe_filtering =
     ARG_DEF(NULL, "enable-keyframe-filtering", 1,
             "Apply temporal filtering on key frame"
-            "(0: no filter, 1: filter without overlay (default),"
-            "2: filter with overlay)");
+            "(0: no filter, 1: filter without overlay (default), "
+            "2: filter with overlay - experimental, may break random access in "
+            "players.)");
 static const arg_def_t tile_width =
     ARG_DEF(NULL, "tile-width", 1, "Tile widths (comma separated)");
 static const arg_def_t tile_height =