diff --git a/netwerk/base/src/nsLoadGroup.cpp b/netwerk/base/src/nsLoadGroup.cpp
index 036b3f75a8d2..c0543c3b5608 100644
--- a/netwerk/base/src/nsLoadGroup.cpp
+++ b/netwerk/base/src/nsLoadGroup.cpp
@@ -1156,7 +1156,7 @@ nsLoadGroupConnectionInfo::SetSpdyPushCache(mozilla::net::SpdyPushCache *aSpdyPu
 
 nsresult nsLoadGroup::Init()
 {
-    static PLDHashTableOps hash_table_ops =
+    static const PLDHashTableOps hash_table_ops =
     {
         PL_DHashAllocTable,
         PL_DHashFreeTable,
diff --git a/netwerk/cache/nsCacheEntry.cpp b/netwerk/cache/nsCacheEntry.cpp
index 42f964de39ae..d639b2713822 100644
--- a/netwerk/cache/nsCacheEntry.cpp
+++ b/netwerk/cache/nsCacheEntry.cpp
@@ -374,7 +374,7 @@ nsCacheEntryInfo::IsStreamBased(bool * result)
  *  nsCacheEntryHashTable
  *****************************************************************************/
 
-PLDHashTableOps
+const PLDHashTableOps
 nsCacheEntryHashTable::ops =
 {
     PL_DHashAllocTable,
diff --git a/netwerk/cache/nsCacheEntry.h b/netwerk/cache/nsCacheEntry.h
index 09382c57e16f..06d305090ac3 100644
--- a/netwerk/cache/nsCacheEntry.h
+++ b/netwerk/cache/nsCacheEntry.h
@@ -303,9 +303,9 @@ private:
                                      void *                 arg);
                                      
     // member variables
-    static PLDHashTableOps ops;
-    PLDHashTable           table;
-    bool                   initialized;
+    static const PLDHashTableOps ops;
+    PLDHashTable                 table;
+    bool                         initialized;
 };
 
 #endif // _nsCacheEntry_h_
diff --git a/netwerk/cache/nsDiskCacheBinding.cpp b/netwerk/cache/nsDiskCacheBinding.cpp
index 50e6a03da429..d07243f2e5f9 100644
--- a/netwerk/cache/nsDiskCacheBinding.cpp
+++ b/netwerk/cache/nsDiskCacheBinding.cpp
@@ -122,7 +122,7 @@ nsDiskCacheBinding::EnsureStreamIO()
  *
  *****************************************************************************/
 
-PLDHashTableOps nsDiskCacheBindery::ops =
+const PLDHashTableOps nsDiskCacheBindery::ops =
 {
     PL_DHashAllocTable,
     PL_DHashFreeTable,
diff --git a/netwerk/cache/nsDiskCacheBinding.h b/netwerk/cache/nsDiskCacheBinding.h
index 2f7f508a399f..e2649b398b17 100644
--- a/netwerk/cache/nsDiskCacheBinding.h
+++ b/netwerk/cache/nsDiskCacheBinding.h
@@ -112,7 +112,7 @@ private:
     nsresult                AddBinding(nsDiskCacheBinding * binding);
 
     // member variables
-    static PLDHashTableOps ops;
+    static const PLDHashTableOps ops;
     PLDHashTable           table;
     bool                   initialized;
 };
diff --git a/netwerk/cache2/CacheFileIOManager.cpp b/netwerk/cache2/CacheFileIOManager.cpp
index 1edbe12c4c9c..3478fa0e348c 100644
--- a/netwerk/cache2/CacheFileIOManager.cpp
+++ b/netwerk/cache2/CacheFileIOManager.cpp
@@ -99,7 +99,7 @@ public:
   SHA1Sum::Hash mHash;
 };
 
-PLDHashTableOps CacheFileHandles::mOps =
+const PLDHashTableOps CacheFileHandles::mOps =
 {
   PL_DHashAllocTable,
   PL_DHashFreeTable,
diff --git a/netwerk/cache2/CacheFileIOManager.h b/netwerk/cache2/CacheFileIOManager.h
index 3de641a76661..58ffbcf6f476 100644
--- a/netwerk/cache2/CacheFileIOManager.h
+++ b/netwerk/cache2/CacheFileIOManager.h
@@ -83,9 +83,9 @@ private:
                                  PLDHashEntryHdr *to);
   static void          ClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry);
 
-  static PLDHashTableOps mOps;
-  PLDHashTable           mTable;
-  bool                   mInitialized;
+  static const PLDHashTableOps mOps;
+  PLDHashTable                 mTable;
+  bool                         mInitialized;
 };
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/netwerk/dns/nsHostResolver.cpp b/netwerk/dns/nsHostResolver.cpp
index 0921c7996e93..f53b59c350f4 100644
--- a/netwerk/dns/nsHostResolver.cpp
+++ b/netwerk/dns/nsHostResolver.cpp
@@ -352,7 +352,7 @@ HostDB_InitEntry(PLDHashTable *table,
     return true;
 }
 
-static PLDHashTableOps gHostDB_ops =
+static const PLDHashTableOps gHostDB_ops =
 {
     PL_DHashAllocTable,
     PL_DHashFreeTable,