Default OTA Update problem

Hello guys,

recently i have on my phone (Prestigio MultiPhone 3400 DUO) modified "/system/build.prop". Yesterday i saw that there is new OTA update for my phone, but when I tried to download ad install it, in recovery there was a error:

assert failed: apply_patch_check("/system/build.prop", "c47a6508986e87bdd807aabc2418c1399735e34e", "4bf6dfef298bc3a61bb9613cb814f2ee0a806d14")

I know that I have to replace modified file with the original one, but I didn't make backup of file. Can someone please send me a copy of this file?

Sorry for bad English

Thanks in advance!