diff --git a/docs/core/logger.md b/docs/core/logger.md
index db2d12a2013..31f21147659 100644
--- a/docs/core/logger.md
+++ b/docs/core/logger.md
@@ -1083,6 +1083,7 @@ external_logger = logging.logger()
 
 utils.copy_config_to_registered_loggers(source_logger=logger)
 external_logger.info("test message")
+```
 
 **What's the difference between `append_keys` and `extra`?**