diff --git a/src/dial.c b/src/dial.c
index 42c11bd..05c1e62 100644
--- a/src/dial.c
+++ b/src/dial.c
@@ -123,7 +123,7 @@ static int bottom_draw_bg(hexagram_gauge *gauge, cairo_t *cr) {
     cairo_arc(cr,
               dial->gauge.x,
               dial->gauge.y,
-              dial->radius - 36,
+              dial->radius * 0.85,
               dial->min_angle - ANGLE_OFFSET - 4 * RAD,
               dial->max_angle - ANGLE_OFFSET + 4 * RAD);