diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index 9072b6582bd6..637333ed26ff 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -5076,6 +5076,14 @@ arc_kmem_reap_soon(void)
 static boolean_t
 arc_adjust_cb_check(void *arg, zthr_t *zthr)
 {
+	/*
+	 * This is necessary so that any changes which may have been made to
+	 * many of the zfs_arc_* module parameters will be propagated to
+	 * their actual internal variable counterparts. Without this,
+	 * changing those module params at runtime would have no effect.
+	 */
+	arc_tuning_update();
+
 	/*
 	 * This is necessary in order to keep the kstat information
 	 * up to date for tools that display kstat data such as the