Hi Muhammed,
I have downloaded the fix and I can see that it does not install if SP1 is not installed.
So it seems you have SP1 installed.
To verify this please run the following script which will provide the patch baseline of your system:
https://blogs.technet.microsoft.com/stefan_gossner/2015/04/20/powershell-script-to-display-version-info-for-installed-sharepoint-product-and-language-packs/
Cheers,
Stefan