diff --git a/src/compiletest/procsrv.rs b/src/compiletest/procsrv.rs
index a37741c2996..84165c857f0 100644
--- a/src/compiletest/procsrv.rs
+++ b/src/compiletest/procsrv.rs
@@ -45,8 +45,8 @@ fn run(lib_path: ~str,
     let pipe_out = os::pipe();
     let pipe_err = os::pipe();
     let pid = spawn_process(prog, args,
-                            some(env + target_env(lib_path, prog)),
-                            none, pipe_in.in, pipe_out.out, pipe_err.out);
+                            &some(env + target_env(lib_path, prog)),
+                            &none, pipe_in.in, pipe_out.out, pipe_err.out);
 
     os::close(pipe_in.in);
     os::close(pipe_out.out);