Assuming you have the ptar.patch file (available from legacy OpenWrt or Linux Wireless archives):
Here’s why, and what may have happened: compatwireless20100626ptar patched
Are you trying to install this on a or a modern Linux distribution ? Assuming you have the ptar
Installing Compat Wireless drivers for Linux Wi-Fi. - AB9IL.net or any surrounding text)
If you can provide more context (where you saw the filename, device type, or any surrounding text), I can help reconstruct or locate the relevant documentation or patch notes.