GDB : changing the assembly code of a running program

I successfuly changed an instruction to a NOP since it is pretty basic:

set *0x08048e3a = 0x90

But I'm trying to change this address 0x08048e3a which has je 0x8048e52. I would like to change it to je 0x8048ea8.

But when I do set *0x08048e3a = 0x74168048ea8 it does not work. (0x7416 = je instruction)

Thank you