--- a/dom/icc/Icc.cpp
+++ b/dom/icc/Icc.cpp
@@ -29,19 +29,19 @@ IsPukCardLockType(IccLockType aLockType)
     case IccLockType::Nck1Puk:
     case IccLockType::Nck2Puk:
     case IccLockType::HnckPuk:
     case IccLockType::CckPuk:
     case IccLockType::SpckPuk:
     case IccLockType::RcckPuk:
     case IccLockType::RspckPuk:
       return true;
+    default:
+      return false;
   }
-
-  return false;
 }
 
 } // anonymous namespace
 
 NS_IMPL_CYCLE_COLLECTION_INHERITED(Icc, DOMEventTargetHelper, mIccInfo)
 
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(Icc)
 NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)