Inno Setup install to SysWOW64 in 32Bit mode

I'm creating an installer which only needs to install 32bit files, they work on both 64 and 32 bit machines.

I'm running the Inno Setup on a 64bit machine and even though the install mode is 32bit the files still end up in the SysWOW64 folder. The Dest directive sets to {sys}

Source: "C:\Users\Lablabla\Documents\Visual Studio 2013\Projects\Test\MyDll.dll"; DestDir: "{sys}"; Flags: 32bit

The weirder thing is that the log shows that the destination is system32 and installation mode as 32-bit

2015-04-12 01:04:14.046   64-bit Windows: Yes
2015-04-12 01:04:14.046   Processor architecture: x64
2015-04-12 01:04:14.046   User privileges: Administrative
2015-04-12 01:04:14.046   64-bit install mode: No
....
2015-04-12 01:04:20.237   Dest filename: C:\Windows\system32\MyDll.dll

But when the setup is done the file is in the SysWOW64 folder, even though the executable file is in the correct place of Program Files (x86)

This happens even when setting the specific 32bit flag to the dll file.

The installation is very simple, only this dll and an executable. No registry or anything more complex.

Anyone experienced such thing?

Thanks