diff --git a/examples/cluster.c b/examples/cluster.c
index 0c4d9f6..46aa16d 100644
--- a/examples/cluster.c
+++ b/examples/cluster.c
@@ -60,7 +60,7 @@ static void draw_tachometer(cairo_t *cr,
       CAIRO_FONT_SLANT_NORMAL,
       CAIRO_FONT_WEIGHT_NORMAL);
 
-    cairo_set_font_size(cr, 24);
+    cairo_set_font_size(cr, r * 0.125);
 
     cairo_set_source_rgb(cr, 1, 1, 1);
     cairo_arc(cr, x, y, r, 0, 2*M_PI);
@@ -187,7 +187,7 @@ int main(int argc, char **argv) {
 
     int screen,
         width  = 1024,
-        height = 480;
+        height =  480;
 
     XGCValues values = {
         .foreground         = 0x000000,