Can't Resolve Variable 'CODE'

I have a project that compiles and runs and uses an enum in a struct like this:

struct {
 void (*action) (const char *, minipro_handle_t *handle, device_t *device);
 char *filename;
 device_t *device;
 enum { UNSPECIFIED = 0, CODE, DATA, CONFIG } page;
 int no_erase;
 int no_protect_off;
 int no_protect_on;
 int size_error;
 int size_nowarn;
 int no_verify;
 int icsp;
 int idcheck_skip;
 int idcheck_continue;
} cmdopts;

However, the editor flags lines like the following as an error even though the code compiles and runs...

if(!strcmp(optarg, "code"))
 cmdopts.page = CODE;

Wayne