diff --git a/src/plugins/fset/fset-buffer.c b/src/plugins/fset/fset-buffer.c
index 72a0a2450..0070eb5b2 100644
--- a/src/plugins/fset/fset-buffer.c
+++ b/src/plugins/fset/fset-buffer.c
@@ -67,8 +67,8 @@ fset_buffer_set_title ()
                 "Sort: %s%s%s | "
                 "Key(input): "
                 "alt+space=toggle boolean, "
-                "alt+'-'(-)=subtract 1, "
-                "alt+'+'(+)=add 1, "
+                "alt+'-'(-)=subtract 1 or set, "
+                "alt+'+'(+)=add 1 or append, "
                 "alt+f,alt+r(r)=reset, "
                 "alf+f,alt+u(u)=unset, "
                 "alt+enter(s)=set, "