diff --git a/src/cpp/ripple/NetworkOPs.cpp b/src/cpp/ripple/NetworkOPs.cpp
index 8855100f1..5651b43da 100644
--- a/src/cpp/ripple/NetworkOPs.cpp
+++ b/src/cpp/ripple/NetworkOPs.cpp
@@ -985,7 +985,7 @@ void NetworkOPs::pubProposedTransaction(Ledger::ref lpCurrent, const SerializedT
 	Json::Value	jvObj	= transJson(stTxn, terResult, false, lpCurrent, "transaction");
 
 	{
-		boost::interprocess::sharable_lock<boost::interprocess::interprocess_upgradable_mutex>	sl(mMonitorLock);
+		boost::recursive_mutex::scoped_lock	sl(mMonitorLock);
 		BOOST_FOREACH(InfoSub* ispListener, mSubRTTransactions)
 		{
 			ispListener->send(jvObj);
@@ -1005,7 +1005,7 @@ void NetworkOPs::pubLedger(Ledger::ref lpAccepted)
 	LoadEvent::pointer event = theApp->getJobQueue().getLoadEvent(jtPUBLEDGER);
 
 	{
-		boost::interprocess::sharable_lock<boost::interprocess::interprocess_upgradable_mutex>	sl(mMonitorLock);
+		boost::recursive_mutex::scoped_lock	sl(mMonitorLock);
 
 		if (!mSubLedger.empty())
 		{
@@ -1078,7 +1078,7 @@ void NetworkOPs::pubAcceptedTransaction(Ledger::ref lpCurrent, const SerializedT
 	Json::Value	jvObj	= transJson(stTxn, terResult, true, lpCurrent, "transaction");
 
 	{
-		boost::interprocess::sharable_lock<boost::interprocess::interprocess_upgradable_mutex>	sl(mMonitorLock);
+		boost::recursive_mutex::scoped_lock	sl(mMonitorLock);
 		BOOST_FOREACH(InfoSub* ispListener, mSubTransactions)
 		{
 			ispListener->send(jvObj);
@@ -1099,7 +1099,7 @@ void NetworkOPs::pubAccountTransaction(Ledger::ref lpCurrent, const SerializedTr
 	boost::unordered_set<InfoSub*>	notify;
 
 	{
-		boost::interprocess::sharable_lock<boost::interprocess::interprocess_upgradable_mutex>	sl(mMonitorLock);
+		boost::recursive_mutex::scoped_lock	sl(mMonitorLock);
 
 		if(!bAccepted && mSubRTAccount.empty()) return;
 
@@ -1185,7 +1185,7 @@ void NetworkOPs::subAccount(InfoSub* ispListener, const boost::unordered_set<Rip
 	subInfoMapType& subMap=mSubAccount;
 	if(rt) subMap=mSubRTAccount;
 
-	boost::interprocess::scoped_lock<boost::interprocess::interprocess_upgradable_mutex>	sl(mMonitorLock);
+	boost::recursive_mutex::scoped_lock	sl(mMonitorLock);
 
 	BOOST_FOREACH(const RippleAddress& naAccountID, vnaAccountIDs)
 	{
@@ -1210,7 +1210,7 @@ void NetworkOPs::unsubAccount(InfoSub* ispListener, const boost::unordered_set<R
 {
 	subInfoMapType& subMap= rt ? mSubRTAccount : mSubAccount;
 
-	boost::interprocess::scoped_lock<boost::interprocess::interprocess_upgradable_mutex>	sl(mMonitorLock);
+	boost::recursive_mutex::scoped_lock	sl(mMonitorLock);
 
 	BOOST_FOREACH(const RippleAddress& naAccountID, vnaAccountIDs)
 	{
diff --git a/src/cpp/ripple/NetworkOPs.h b/src/cpp/ripple/NetworkOPs.h
index 4826979e1..7dc00bcb8 100644
--- a/src/cpp/ripple/NetworkOPs.h
+++ b/src/cpp/ripple/NetworkOPs.h
@@ -1,8 +1,7 @@
 #ifndef __NETWORK_OPS__
 #define __NETWORK_OPS__
 
-#include <boost/interprocess/sync/interprocess_upgradable_mutex.hpp>
-#include <boost/interprocess/sync/sharable_lock.hpp>
+#include <boost/thread/recursive_mutex.hpp>
 #include <boost/unordered_map.hpp>
 #include <boost/unordered_set.hpp>
 
@@ -89,7 +88,7 @@ protected:
 
 
 	// XXX Split into more locks.
-    boost::interprocess::interprocess_upgradable_mutex	mMonitorLock;
+    boost::recursive_mutex								mMonitorLock;
 	subInfoMapType										mSubAccount;
 	subInfoMapType										mSubRTAccount;
 	subSubmitMapType									mSubmitMap;   // TODO: probably dump this