diff --git a/docs/admin/logging/overview.md b/docs/admin/logging/overview.md
index 4c4c16304a..4688709b99 100644
--- a/docs/admin/logging/overview.md
+++ b/docs/admin/logging/overview.md
@@ -71,8 +71,8 @@ This adds additional fields to the log depending on the driver, e.g. for
 The following logging options are supported for the `json-file` logging driver:
 
 ```bash
---log-opt max-size=[0-9+][k|m|g]
---log-opt max-file=[0-9+]
+--log-opt max-size=[0-9]+[kmg]
+--log-opt max-file=[0-9]+
 --log-opt labels=label1,label2
 --log-opt env=env1,env2
 ```