1 files changed, 1 insertions, 1 deletions
diff --git a/src/libgreen/basic.rs b/src/libgreen/basic.rs
index 2877768dd8b..3aa3d6742eb 100644
--- a/src/libgreen/basic.rs
+++ b/src/libgreen/basic.rs
@@ -243,7 +243,7 @@ mod test {
         })
     }
 
-    fn run(f: proc()) {
+    fn run(f: proc():Send) {
         let mut pool = pool();
         pool.spawn(TaskOpts::new(), f);
         pool.shutdown();