diff --git a/chapters/ch04.2-writing-logs.md b/chapters/ch04.2-writing-logs.md
index 256498d..9c0d6c2 100644
--- a/chapters/ch04.2-writing-logs.md
+++ b/chapters/ch04.2-writing-logs.md
@@ -754,7 +754,7 @@ class Logger {
         }
 
         // write logs to the opened file
-        await this.#log_file_handle.write(log_message);
+        await this.#log_file_handle.write(message);
     }
     ...
 }