diff --git a/src/runtime2/tests/mod.rs b/src/runtime2/tests/mod.rs
index 28448eebad2897ede211d30682d958c2ac5d8251..bd77094a301b7c01383b7da4faa7cb00425ddec9 100644
--- a/src/runtime2/tests/mod.rs
+++ b/src/runtime2/tests/mod.rs
@@ -225,6 +225,8 @@ fn test_empty_select() {
 #[test]
 fn test_random_u32_temporary_thingo() {
     let pd = ProtocolDescription::parse(b"
+    import std.random::random_u32;
+
     primitive random_taker(in<u32> generator, u32 num_values) {
         auto i = 0;
         while (i < num_values) {