diff --git a/js/src/jscompartment.cpp b/js/src/jscompartment.cpp
index 28bda78eb362..8c012e3fb470 100644
--- a/js/src/jscompartment.cpp
+++ b/js/src/jscompartment.cpp
@@ -35,6 +35,7 @@
 #include "jsscriptinlines.h"
 
 #include "vm/NativeObject-inl.h"
+#include "vm/UnboxedObject-inl.h"
 
 using namespace js;
 using namespace js::gc;