--- a/js/src/builtin/intl/PluralRules.cpp
+++ b/js/src/builtin/intl/PluralRules.cpp
@@ -126,21 +126,25 @@ PluralRules(JSContext* cx, unsigned argc
 void
 js::PluralRulesObject::finalize(FreeOp* fop, JSObject* obj)
 {
     MOZ_ASSERT(fop->onActiveCooperatingThread());
 
     PluralRulesObject* pluralRules = &obj->as<PluralRulesObject>();
 
     const Value& prslot = pluralRules->getReservedSlot(PluralRulesObject::UPLURAL_RULES_SLOT);
-    if (UPluralRules* pr = static_cast<UPluralRules*>(prslot.toPrivate()))
+    UPluralRules* pr = static_cast<UPluralRules*>(prslot.toPrivate());
+
+    const Value& nfslot = pluralRules->getReservedSlot(PluralRulesObject::UNUMBER_FORMAT_SLOT);
+    UNumberFormat* nf = static_cast<UNumberFormat*>(nfslot.toPrivate());
+
+    if (pr)
         uplrules_close(pr);
 
-    const Value& nfslot = pluralRules->getReservedSlot(PluralRulesObject::UNUMBER_FORMAT_SLOT);
-    if (UNumberFormat* nf = static_cast<UNumberFormat*>(nfslot.toPrivate()))
+    if (nf)
         unum_close(nf);
 }
 
 JSObject*
 js::CreatePluralRulesPrototype(JSContext* cx, HandleObject Intl, Handle<GlobalObject*> global)
 {
     RootedFunction ctor(cx);
     ctor = global->createConstructor(cx, &PluralRules, cx->names().PluralRules, 0);