diff --git a/libretroshare/src/util/rsthreads.cc b/libretroshare/src/util/rsthreads.cc
index acc4657bb..2f62d2881 100644
--- a/libretroshare/src/util/rsthreads.cc
+++ b/libretroshare/src/util/rsthreads.cc
@@ -144,3 +144,49 @@ void RsQueueThread::run()
 	}
 }
 
+RsReadWriteMutex::RsReadWriteMutex():readLocks(0) {
+}
+
+void RsReadWriteMutex::readLock() {
+    internalCounterMtx.lock();//lock internal read counter
+    if (readLocks == 0) {
+        lock(); //lock normal mutex
+    }
+    readLocks++;
+    internalCounterMtx.unlock();
+}
+
+void RsReadWriteMutex::readUnlock() {
+    internalCounterMtx.lock();//lock internal read counter
+    if (readLocks == 1) {
+        unlock();
+    }
+    if (readLocks != 0) {
+        readLocks--;
+    }
+    internalCounterMtx.unlock();
+}
+
+void RsReadWriteMutex::writeLock() {
+    lock();
+}
+
+void RsReadWriteMutex::writeUnlock() {
+    unlock();
+}
+
+void RsReadWriteMutex::rwlock(uint32_t type) {
+    if (type & READ_LOCK) {
+        readLock();
+    } else {
+        writeLock();
+    }
+}
+
+void RsReadWriteMutex::rwunlock(uint32_t type) {
+    if (type & READ_LOCK) {
+        readUnlock();
+    } else {
+        writeUnlock();
+    }
+}
diff --git a/libretroshare/src/util/rsthreads.h b/libretroshare/src/util/rsthreads.h
index 550073c9a..a923b2ed5 100644
--- a/libretroshare/src/util/rsthreads.h
+++ b/libretroshare/src/util/rsthreads.h
@@ -101,15 +101,15 @@ class RsStackMutex
 class RsReadWriteMutex: public RsMutex
 {
         public:
-        RsReadWriteMutex(): readLocks(0) {  }
+        RsReadWriteMutex();
 
-        void readLock() {  if (readLocks == 0) {lock();} ; readLocks++;}
-        void readUnlock() { if (readLocks == 1) {unlock();} if (readLocks != 0) {readLocks--;}  }
-        void writeLock() {lock();}
-        void writeUnlock() {unlock();}
+        void readLock();
+        void readUnlock();
+        void writeLock();
+        void writeUnlock();
 
-        void rwlock(uint32_t type) {  if (type & READ_LOCK) {readLock();} else {writeLock();} }
-        void rwunlock(uint32_t type) {  if (type & READ_LOCK) {readUnlock();} else {writeUnlock();} }
+        void rwlock(uint32_t type);
+        void rwunlock(uint32_t type);
 
         const static uint32_t READ_LOCK = 0x0001;
         const static uint32_t WRITE_LOCK = 0x0002;
@@ -117,6 +117,7 @@ class RsReadWriteMutex: public RsMutex
 
         private:
         int readLocks;
+        RsMutex internalCounterMtx;
 };
 
 class RsStackReadWriteMutex