diff --git a/srcpkgs/planner/patches/vala-0.56.patch b/srcpkgs/planner/patches/vala-0.56.patch
new file mode 100644
index 00000000000..bff39d43cc1
--- /dev/null
+++ b/srcpkgs/planner/patches/vala-0.56.patch
@@ -0,0 +1,25 @@
+From 87be3e27ccc8f9a1ef7fbeec9600459eb4569200 Mon Sep 17 00:00:00 2001
+From: Bobby Rong <rjl931189261@126.com>
+Date: Mon, 14 Mar 2022 23:36:21 +0800
+Subject: [PATCH] Fix build with vala 0.56
+
+Otherwise build fails with
+
+../src/Application.vala:45.50-55.5: error: value is less accessible than constant `Planner.PLANNER_OPTIONS'
+---
+ src/Application.vala | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Application.vala b/src/Application.vala
+index 8c1c9ddb..ebd8f726 100644
+--- a/src/Application.vala
++++ b/src/Application.vala
+@@ -42,7 +42,7 @@ public class Planner : Gtk.Application {
+     private static bool clear_database = false;
+     private static string lang = "";
+ 
+-    public const OptionEntry[] PLANNER_OPTIONS = {
++    private const OptionEntry[] PLANNER_OPTIONS = {
+         { "version", 'v', 0, OptionArg.NONE, ref version,
+         "Display version number", null },
+         { "reset", 'r', 0, OptionArg.NONE, ref clear_database,