diff --git a/pages/common/docker-system.md b/pages/common/docker-system.md
index 49f1f27b73..0ed6ad81af 100644
--- a/pages/common/docker-system.md
+++ b/pages/common/docker-system.md
@@ -15,7 +15,7 @@
 
 `docker system df --verbose`
 
-- Remove unused data:
+- Remove unused data (append `--volumes` to remove unused volumes as well):
 
 `docker system prune`