diff --git a/sbin/hastd/subr.c b/sbin/hastd/subr.c
index 45218bbdf27c..b8ee38971b25 100644
--- a/sbin/hastd/subr.c
+++ b/sbin/hastd/subr.c
@@ -149,7 +149,7 @@ role2str(int role)
 }
 
 int
-drop_privs(struct hast_resource *res)
+drop_privs(const struct hast_resource *res)
 {
 	char jailhost[sizeof(res->hr_name) * 2];
 	struct jail jailst;
diff --git a/sbin/hastd/subr.h b/sbin/hastd/subr.h
index e76930aa0f6a..c7657544630f 100644
--- a/sbin/hastd/subr.h
+++ b/sbin/hastd/subr.h
@@ -51,6 +51,6 @@ int snprlcat(char *str, size_t size, const char *fmt, ...);
 
 int provinfo(struct hast_resource *res, bool dowrite);
 const char *role2str(int role);
-int drop_privs(struct hast_resource *res);
+int drop_privs(const struct hast_resource *res);
 
 #endif	/* !_SUBR_H_ */