diff --git a/juno_samples/multi_return/src/gpu.sch b/juno_samples/multi_return/src/gpu.sch
index 0c0b569a04de833f592ed656c03679bd01567ded..f690086b5c213eca585f9640d0f7419364800e11 100644
--- a/juno_samples/multi_return/src/gpu.sch
+++ b/juno_samples/multi_return/src/gpu.sch
@@ -26,5 +26,6 @@ gvn(*);
 dce(*);
 
 float-collections(*);
+unforkify(*);
 
 gcm(*);