diff --git a/examples/Queries with Filters.md b/examples/Queries with Filters.md
index 882de69..171afd4 100644
--- a/examples/Queries with Filters.md	
+++ b/examples/Queries with Filters.md	
@@ -12,7 +12,7 @@ zbx = ZabbixApi.connect(url: '<url>', user: '<user>', password: '<passwd>', debu
 
 #### debug on demand
 ``` ruby
-zbx.client.options[debug: true]
+zbx.client.options[:debug] = true
 ```
 
 ### Listing all objects of a type: "all"