diff --git a/archiso/scripts/update-patch.sh b/archiso/scripts/update-patch.sh
new file mode 100755
index 00000000..75537a67
--- /dev/null
+++ b/archiso/scripts/update-patch.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+# Updates the patch to be applicable to Arch's current `releng` template.
+rootDir="${BASH_SOURCE%/*}";
+"$rootDir/show-diff.sh" | tee "$rootDir/valhalla.patch";