diff --git a/run b/run
index 304705d..e9f19c1 100755
--- a/run
+++ b/run
@@ -206,7 +206,7 @@ See: http://github.com/cirosantilli/linux-kernel-module-cheat#kvm
             '--memory',
             default='256M',
             help='''\
-Set the memory size of the guest. E.g.: `-m 512M`. We try to keep the default
+Set the memory size of the guest. E.g.: `--memory 512M`. We try to keep the default
 at the minimal ammount amount that boots all archs. Anything lower could lead
 some arch to fail to boot.
 Default: %(default)s
@@ -504,7 +504,6 @@ Extra options to append at the end of the emulator command line.
                         self.env['gem5_fs_file'], LF,
                         '--disk-image', self.env['disk_image'], LF,
                         '--kernel', self.env['image'], LF,
-                        '--mem-size', memory, LF,
                         '--num-cpus', str(self.env['cpus']), LF,
                         '--script', self.env['gem5_readfile_file'], LF,
                     ])
@@ -590,6 +589,7 @@ Extra options to append at the end of the emulator command line.
                             ),
                             LF
                         ])
+            cmd.extend(['--mem-size', memory, LF])
             if self.env['gdb_wait']:
                 # https://stackoverflow.com/questions/49296092/how-to-make-gem5-wait-for-gdb-to-connect-to-reliably-break-at-start-kernel-of-th
                 cmd.extend(['--param', 'system.cpu[0].wait_for_remote_gdb = True', LF])