diff --git a/src/cpp/ripple/NetworkOPs.h b/src/cpp/ripple/NetworkOPs.h
index 41515b003a..0997f42af8 100644
--- a/src/cpp/ripple/NetworkOPs.h
+++ b/src/cpp/ripple/NetworkOPs.h
@@ -33,11 +33,14 @@ protected:
 	boost::unordered_set<RippleAddress>			mSubAccountInfo;
 	boost::unordered_set<RippleAddress>			mSubAccountTransaction;
 
+	boost::mutex								mLock;
+
 public:
-  void insertSubAccountInfo(RippleAddress addr)
-  {
-    mSubAccountInfo.insert(addr);
-  }
+	void insertSubAccountInfo(RippleAddress addr)
+	{
+		boost::mutex::scoped_lock sl(mLock);
+		mSubAccountInfo.insert(addr);
+	}
 };
 
 class NetworkOPs
diff --git a/src/cpp/ripple/RPCHandler.cpp b/src/cpp/ripple/RPCHandler.cpp
index 9d9d1544e7..dbe8e824e7 100644
--- a/src/cpp/ripple/RPCHandler.cpp
+++ b/src/cpp/ripple/RPCHandler.cpp
@@ -2023,8 +2023,6 @@ Json::Value RPCHandler::doSubscribe(const Json::Value& jvRequest)
 			jvResult["error"]	= "malformedAccount";
 		}else
 		{
-			boost::mutex::scoped_lock	sl(mLock);
-
 			BOOST_FOREACH(const RippleAddress& naAccountID, usnaAccoundIds)
 			{
 				isCurrent->insertSubAccountInfo(naAccountID);
@@ -2043,8 +2041,6 @@ Json::Value RPCHandler::doSubscribe(const Json::Value& jvRequest)
 			jvResult["error"]	= "malformedAccount";
 		}else
 		{
-			boost::mutex::scoped_lock	sl(mLock);
-
 			BOOST_FOREACH(const RippleAddress& naAccountID, usnaAccoundIds)
 			{
 				isCurrent->insertSubAccountInfo(naAccountID);
@@ -2101,8 +2097,6 @@ Json::Value RPCHandler::doUnsubscribe(const Json::Value& jvRequest)
 			jvResult["error"]	= "malformedAccount";
 		}else
 		{
-			boost::mutex::scoped_lock	sl(mLock);
-
 			BOOST_FOREACH(const RippleAddress& naAccountID, usnaAccoundIds)
 			{
 				isCurrent->insertSubAccountInfo(naAccountID);
@@ -2121,8 +2115,6 @@ Json::Value RPCHandler::doUnsubscribe(const Json::Value& jvRequest)
 			jvResult["error"]	= "malformedAccount";
 		}else
 		{
-			boost::mutex::scoped_lock	sl(mLock);
-
 			BOOST_FOREACH(const RippleAddress& naAccountID, usnaAccoundIds)
 			{
 				isCurrent->insertSubAccountInfo(naAccountID);
diff --git a/src/cpp/ripple/RPCHandler.h b/src/cpp/ripple/RPCHandler.h
index 90cc0132aa..7e804d1979 100644
--- a/src/cpp/ripple/RPCHandler.h
+++ b/src/cpp/ripple/RPCHandler.h
@@ -8,7 +8,6 @@ class RPCHandler
 {
 	NetworkOPs*		mNetOps;
 	InfoSub*		isCurrent;
-	boost::mutex	mLock;
 
 	typedef Json::Value (RPCHandler::*doFuncPtr)(const Json::Value &params);
 	enum {