diff --git a/include/sys/spa.h b/include/sys/spa.h
index 510d1119b..ecf3cd8a2 100644
--- a/include/sys/spa.h
+++ b/include/sys/spa.h
@@ -1213,7 +1213,7 @@ extern void vdev_mirror_stat_fini(void);
 /* Initialization and termination */
 extern void spa_init(spa_mode_t mode);
 extern void spa_fini(void);
-extern void spa_boot_init(void);
+extern void spa_boot_init(void *);
 
 /* properties */
 extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c
index 0550dfd47..2e67a27c5 100644
--- a/module/zfs/spa_misc.c
+++ b/module/zfs/spa_misc.c
@@ -2521,8 +2521,9 @@ spa_name_compare(const void *a1, const void *a2)
 }
 
 void
-spa_boot_init(void)
+spa_boot_init(void *unused)
 {
+	(void) unused;
 	spa_config_load();
 }