diff --git a/xpcom/base/AvailableMemoryTracker.cpp b/xpcom/base/AvailableMemoryTracker.cpp
index 4cbbdd683a50..9fca531604fe 100644
--- a/xpcom/base/AvailableMemoryTracker.cpp
+++ b/xpcom/base/AvailableMemoryTracker.cpp
@@ -340,6 +340,8 @@ LowMemoryEventsPhysicalDistinguishedAmount()
 
 class LowEventsReporter MOZ_FINAL : public nsIMemoryReporter
 {
+  ~LowEventsReporter() {}
+
 public:
   NS_DECL_ISUPPORTS