Qt 5.4.0 deployment issue - missing vsprintf_s in msvcrt.dll

I'm stuck in a deployment issue with my Qt 5.4.0 application. After two days of research, my app really doesn't want to execute on Windows XP !

I have created my deployment folder with windeployqt provided by my Qt installation. When I double-click on *.exe, I have always :

The procedure entry point vsprintf_s could not be located in the dynamic link library msvcrt.dll.

Dependency walker hasn't really helped me and I don't know what I can try now.

Note :

SDK : Qt 5.4.0 (MSVC 2010, 32 Bits)
IDE : QT Creator 3.3.0
Compiler : MinGW 4.9.1 32 Bits
Need to run on : Windows XP Pro SP2 32 Bits
App works like a charm on Windows 7 with same configuration (IDE, compiler, etc.)

Solution

The error was I called "sprintf_s" somewhere in my code (ok for recent windows on my dev machine but not for XP). If you have the same problem when you search in your code don't use exactly the name of the function in the error message but an expression like *_s. You probably call a secure API function somewhere !