Unknown type name 'lv_point_precise_t'

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I solved the missing app_main problem posted today in another thread, by taking the workiing example and hollowing it out and added a simple draw line from the lvgl documentation examples.

But the drawline example leads to an error:

unknown type name 'lv_point_precise_t'

#include "../../lv_examples.h"
#if LV_USE_LINE && LV_BUILD_EXAMPLES

void lv_example_line_1(void)
{
    /*Create an array for the points of the line*/
    static **lv_point_precise_t** line_points[] = { {5, 5}, {70, 70}, {120, 10}, {180, 60}, {240, 10} };

    /*Create style*/
    static lv_style_t style_line;
    lv_style_init(&style_line);
    lv_style_set_line_width(&style_line, 8);
    lv_style_set_line_color(&style_line, lv_palette_main(LV_PALETTE_BLUE));
    lv_style_set_line_rounded(&style_line, true);

    /*Create a line and apply the new style*/
    lv_obj_t * line1;
    line1 = lv_line_create(lv_screen_active());
    lv_line_set_points(line1, line_points, 5);     /*Set the points*/
    lv_obj_add_style(line1, &style_line, 0);
    lv_obj_center(line1);
}

#endif

This leads (I’m using 9.0 - btw, where can I see which version I’m using? I thought I was using 9.0)
to the error I’m citing iin the subject.

EDIT: I got around the problem for the moment by using lv_point_tinstead.