diff --git a/README.md b/README.md
index 2ab69f6d..835d1dd4 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ pflag.BoolN("help", "h", false, "show help") // -h, -help
 
 ### Custom Optarg Delimiter
 
-Support custom optarg delimiter (e.g. `-agentlib:jdwp`).
+Support custom optarg delimiter (e.g. `java -agentlib:jdwp`).
 
 ```go
 rootCmd.Flags().StringS("agentlib", "agentlib", "", "load native agent library")