diff --git a/DOCS/man/mpv.rst b/DOCS/man/mpv.rst
index b78501937eec3..b800416a3b680 100644
--- a/DOCS/man/mpv.rst
+++ b/DOCS/man/mpv.rst
@@ -167,6 +167,9 @@ Alt+v
 j and J
     Cycle through the available subtitles.
 
+k and K
+    Cycle through the available secondary subtitles.
+
 z and Z
     Adjust subtitle delay by -/+ 0.1 seconds. The ``x`` key does the same as
     ``Z`` currently, but use is discouraged.
diff --git a/etc/input.conf b/etc/input.conf
index a94fba0b6cd83..793e0770f75dc 100644
--- a/etc/input.conf
+++ b/etc/input.conf
@@ -142,6 +142,8 @@
 #u cycle-values sub-ass-override "force" "scale" # toggle overriding SSA/ASS subtitle styles with the normal styles
 #j cycle sub                            # switch subtitle track
 #J cycle sub down                       # switch subtitle track backwards
+#+k cycle secondary-sid           # cycle secondary subtitle track
+#+K cycle secondary-sid down
 #SHARP cycle audio                      # switch audio track
 #_ cycle video                          # switch video track
 #T cycle ontop                          # toggle placing the video on top of other windows