diff --git a/xpcom/glue/nsTHashtable.h b/xpcom/glue/nsTHashtable.h
index fd4ee26c0df..0f3ee3f9a24 100644
--- a/xpcom/glue/nsTHashtable.h
+++ b/xpcom/glue/nsTHashtable.h
@@ -90,10 +90,6 @@ PL_DHashStubEnumRemove(PLDHashTable    *table,
  *
  *     // HashKey(): calculate the hash number
  *     static PLDHashNumber HashKey(KeyTypePointer aKey);
- *
- *     // ALLOW_MEMMOVE can we move this class with memmove(), or do we have
- *     // to use the copy constructor?
- *     enum { ALLOW_MEMMOVE = PR_(TRUE or FALSE) };
  *   }</pre>
  *
  * @see nsInterfaceHashtable
@@ -246,11 +242,9 @@ public:
   }
 
 protected:
+  static const PLDHashTableOps sOps;
   PLDHashTable mTable;
 
-  static const void* PR_CALLBACK s_GetKey(PLDHashTable    *table,
-                                          PLDHashEntryHdr *entry);
-
   static PLDHashNumber PR_CALLBACK s_HashKey(PLDHashTable *table,
                                              const void   *key);
 
@@ -258,10 +252,6 @@ protected:
                                          const PLDHashEntryHdr  *entry,
                                          const void             *key);
   
-  static void PR_CALLBACK s_CopyEntry(PLDHashTable          *table,
-                                      const PLDHashEntryHdr *from,
-                                      PLDHashEntryHdr       *to);
-  
   static void PR_CALLBACK s_ClearEntry(PLDHashTable *table,
                                        PLDHashEntryHdr *entry);
 
@@ -298,6 +288,20 @@ private:
 // template definitions
 //
 
+template<class EntryType>
+const PLDHashTableOps
+nsTHashtable<EntryType>::sOps =
+{
+  ::PL_DHashAllocTable,
+  ::PL_DHashFreeTable,
+  s_HashKey,
+  s_MatchEntry,
+  ::PL_DHashMoveEntryStub,
+  s_ClearEntry,
+  ::PL_DHashFinalizeStub,
+  s_InitEntry
+};
+
 template<class EntryType>
 nsTHashtable<EntryType>::nsTHashtable()
 {
@@ -322,23 +326,6 @@ nsTHashtable<EntryType>::Init(PRUint32 initSize)
     return PR_TRUE;
   }
 
-  static PLDHashTableOps sOps = 
-  {
-    ::PL_DHashAllocTable,
-    ::PL_DHashFreeTable,
-    s_HashKey,
-    s_MatchEntry,
-    ::PL_DHashMoveEntryStub,
-    s_ClearEntry,
-    ::PL_DHashFinalizeStub,
-    s_InitEntry
-  };
-
-  if (!EntryType::ALLOW_MEMMOVE)
-  {
-    sOps.moveEntry = s_CopyEntry;
-  }
-  
   if (!PL_DHashTableInit(&mTable, &sOps, nsnull, sizeof(EntryType), initSize))
   {
     // if failed, reset "flag"
@@ -369,20 +356,6 @@ nsTHashtable<EntryType>::s_MatchEntry(PLDHashTable          *table,
     reinterpret_cast<const KeyTypePointer>(key));
 }
 
-template<class EntryType>
-void
-nsTHashtable<EntryType>::s_CopyEntry(PLDHashTable          *table,
-                                     const PLDHashEntryHdr *from,
-                                     PLDHashEntryHdr       *to)
-{
-  EntryType* fromEntry =
-    const_cast<EntryType*>(reinterpret_cast<const EntryType*>(from));
-
-  new(to) EntryType(*fromEntry);
-
-  fromEntry->~EntryType();
-}
-
 template<class EntryType>
 void
 nsTHashtable<EntryType>::s_ClearEntry(PLDHashTable    *table,