diff --git a/shell/coord-hooks.sh b/shell/coord-hooks.sh
index 700897f..944e2db 100644
--- a/shell/coord-hooks.sh
+++ b/shell/coord-hooks.sh
@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # SPDX-License-Identifier: MPL-2.0
 # Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
 #