diff --git a/programs/refs.ed b/programs/refs.ed
index b7b376211..bc1240ceb 100644
--- a/programs/refs.ed
+++ b/programs/refs.ed
@@ -7,7 +7,7 @@ mod Main {
         return a;
     }
 
-    pub fn hello(a: &mut i32) {
+    pub fn hello(a: &mut i64) {
         *a = 2;
     }
 }