Is there a way to set ro.kernel.qemu to 0 in a emulator?

I replaced a modified build.prop which contains ro.kernel.qemu=0 to the system.img with yaffey, but it did not work. When the emulator restarted, ro.kernel.qemu=1 still exists in the output of adb shell getprop.

Did I need to compile the kernel myself? Is there any other way to achieve this?