diff --git a/samples/hello_world.psy b/samples/hello_world.psy
index 132c5c7..61b2ecc 100644
--- a/samples/hello_world.psy
+++ b/samples/hello_world.psy
@@ -1,9 +1,12 @@
+puts : (str : i8*) -> i64 = extern;
+
 main : () -> i64
 {
+	puts("Hello, World!");
 	return 0;	
 }
 
-== build ==
+== default : build ==
 {
 	set_linkage("executable");
 	set_output("hello_world.exe");