diff --git a/ets2panda/compiler/lowering/phase.cpp b/ets2panda/compiler/lowering/phase.cpp
index c588a5e35970eddd4174be31ed14ebbb628b877e..081702c6be9338c27913d392b55ce90ef358d779 100644
--- a/ets2panda/compiler/lowering/phase.cpp
+++ b/ets2panda/compiler/lowering/phase.cpp
@@ -152,6 +152,7 @@ std::vector<Phase *> GetETSPhaseList()
         new TypeFromLowering,
         new PrimitiveConversionPhase,
         new UnionLowering,
+        new UnboxPhase,
         // pluginsAfterLowerings has to come at the very end, nothing should go after it
         new PluginPhase{g_pluginsAfterLowering, ES2PANDA_STATE_LOWERED,
                         &util::Plugin::AfterLowerings},