diff --git a/haversine_02/compile b/haversine_02/compile
index 7dc1e77..d88b6d4 100755
--- a/haversine_02/compile
+++ b/haversine_02/compile
@@ -30,7 +30,7 @@ done
 
 # BUILD TYPE
 if [[ $RELEASE == true ]]; then
-	CFLAGS+="-O3"
+	CFLAGS+="-g -O1"
 else
 	CFLAGS+="-g"
 fi