diff --git a/engine/api/sdk/examples.md b/engine/api/sdk/examples.md
index 212de2916c..d658137c25 100644
--- a/engine/api/sdk/examples.md
+++ b/engine/api/sdk/examples.md
@@ -245,7 +245,7 @@ func main() {
 		panic(err)
 	}
 
-	containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{})
+	containers, err := cli.ContainerList(ctx, types.ContainerListOptions{})
 	if err != nil {
 		panic(err)
 	}