diff --git a/document/4-Web_Application_Security_Testing/07-Input_Validation_Testing/03.2-Testing_for_MySQL.md b/document/4-Web_Application_Security_Testing/07-Input_Validation_Testing/03.2-Testing_for_MySQL.md
index 65565d80fe..a17e08bfda 100644
--- a/document/4-Web_Application_Security_Testing/07-Input_Validation_Testing/03.2-Testing_for_MySQL.md
+++ b/document/4-Web_Application_Security_Testing/07-Input_Validation_Testing/03.2-Testing_for_MySQL.md
@@ -60,7 +60,7 @@ For example the following injection will result in an error:
 
 #### Fingerprinting MySQL
 
-Of course, the first thing to know is if there's MySQL DBMS as a back end database. MySQL server has a feature that is used to let other DBMS ignore a clause in MySQL dialect. When a comment block `'/**/'` contains an exclamation mark `'/*! sql here*/'` it is interpreted by MySQL, and is considered as a normal comment block by other DBMS as explained in [MySQL manual](https://dev.mysql.com/doc/refman/8.0/en/comments.html).
+Of course, the first thing to know is if there's MySQL DBMS as a backend database. MySQL server has a feature that is used to let other DBMS ignore a clause in MySQL dialect. When a comment block `'/**/'` contains an exclamation mark `'/*! sql here*/'` it is interpreted by MySQL, and is considered as a normal comment block by other DBMS as explained in [MySQL manual](https://dev.mysql.com/doc/refman/8.0/en/comments.html).
 
 Example: