diff --git a/examples/cluster.c b/examples/cluster.c
index 3e6d796..d900733 100644
--- a/examples/cluster.c
+++ b/examples/cluster.c
@@ -36,16 +36,16 @@ static void draw_face_number(cairo_t *cr,
                              double max_angle,
                              double value,
                              const char *text) {
-    double angle = min_angle + ((max_angle - min_angle) * value) - 95;
+    double angle = min_angle + ((max_angle - min_angle) * value) - 1.658;
 
     cairo_set_source_rgb(cr, 1, 1, 1);
 
     cairo_move_to(cr,
-                  x + r * cos((M_PI/180.0) * angle),
-                  y + r * sin((M_PI/180.0) * angle));
+                  x + r * cos(angle),
+                  y + r * sin(angle));
 
     cairo_save(cr);
-    cairo_rotate(cr, (M_PI/180.0) * (angle + 95));
+    cairo_rotate(cr, angle + 1.658);
     cairo_show_text(cr, text);
     cairo_restore(cr);
 }
@@ -73,7 +73,13 @@ static void draw_tachometer(cairo_t *cr,
         char text[4];
 
         snprintf(text, 3, "%02d", i);
-        draw_face_number(cr, x, y, 0.85 * r, 232, 488, i / 80.0, text);
+
+        draw_face_number(cr, x, y,
+                                0.85 * r,
+                                232 * (M_PI/180),
+                                488 * (M_PI/180),
+                                i / 80.0,
+                                text);
     }
 
     /*