diff --git a/bash/sipwise-base.sh b/bash/sipwise-base.sh
index 75543e7..23d7bfc 100644
--- a/bash/sipwise-base.sh
+++ b/bash/sipwise-base.sh
@@ -1,6 +1,7 @@
 #
 # Collection of Sipwise common bash functions.
 #
+# shellcheck shell=bash
 
 set -e
 set -u
diff --git a/bash/sipwise-init.sh b/bash/sipwise-init.sh
index 486b313..2be367b 100644
--- a/bash/sipwise-init.sh
+++ b/bash/sipwise-init.sh
@@ -1,3 +1,4 @@
 #
 # Collection of Sipwise sysvinit bash functions.
 #
+# shellcheck shell=bash