--- a/xpcom/components/nsCategoryManager.cpp
+++ b/xpcom/components/nsCategoryManager.cpp
@@ -464,23 +464,21 @@ nsCategoryManager::nsCategoryManager()
 {
   PL_INIT_ARENA_POOL(&mArena, "CategoryManagerArena",
                      NS_CATEGORYMANAGER_ARENA_SIZE);
 }
 
 void
 nsCategoryManager::InitMemoryReporter()
 {
-  RegisterWeakMemoryReporter(this);
+  RegisterStrongMemoryReporter(this);
 }
 
 nsCategoryManager::~nsCategoryManager()
 {
-  UnregisterWeakMemoryReporter(this);
-
   // the hashtable contains entries that must be deleted before the arena is
   // destroyed, or else you will have PRLocks undestroyed and other Really
   // Bad Stuff (TM)
   mTable.Clear();
 
   PL_FinishArenaPool(&mArena);
 }