diff --git a/etc/rc1.d/01-enclosing-instance b/etc/rc1.d/01-enclosing-instance
index 6f1db83ed2b0..d4e62800af8c 100755
--- a/etc/rc1.d/01-enclosing-instance
+++ b/etc/rc1.d/01-enclosing-instance
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # Inform the enclosing instance (if any) of the URI's for this instance
 
 update_parent() {
diff --git a/etc/rc1.d/02-hostlist b/etc/rc1.d/02-hostlist
index e532f080f831..307ba01501b3 100755
--- a/etc/rc1.d/02-hostlist
+++ b/etc/rc1.d/02-hostlist
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # Populate resource.hosts for this instance using either R_lite
 #  from the parent instance if this is a flux job, or flux-exec hostname
 #