diff --git a/examples/optimizer_purity.myc b/examples/optimizer_purity.myc
index 13fb7d8..1a1fe80 100644
--- a/examples/optimizer_purity.myc
+++ b/examples/optimizer_purity.myc
@@ -1,7 +1,6 @@
 ;; Benchmark: 503ns
 ;; Benchmark-Repeat: 3987
-(do
-  (def PI 3.1415)
-  (def area (fn [x] (* PI x)))
-  (area 10)
-)
\ No newline at end of file
+(do
+  (def area (fn [x] (* PI x)))
+  (area 10)
+)