diff --git a/src/libcore/sched_remote.cpp b/src/libcore/sched_remote.cpp
index 95f737c5..3b8b2496 100644
--- a/src/libcore/sched_remote.cpp
+++ b/src/libcore/sched_remote.cpp
@@ -73,6 +73,9 @@ RemoteWorker::RemoteWorker(const std::string &name, Stream *stream) : Worker(nam
 
 RemoteWorker::~RemoteWorker() {
 	Log(EDebug, "Shutting down");
+	if (!m_reader || !m_mutex || !m_memStream)
+		return;
+
 	LockGuard lock(m_mutex);
 	m_reader->shutdown();
 	m_memStream->writeShort(StreamBackend::EQuit);
diff --git a/src/libcore/sstream.cpp b/src/libcore/sstream.cpp
index d63932ad..05729d11 100644
--- a/src/libcore/sstream.cpp
+++ b/src/libcore/sstream.cpp
@@ -39,6 +39,9 @@
 
 MTS_NAMESPACE_BEGIN
 
+static StatsCounter bytesRcvd("Network", "Bytes received");
+static StatsCounter bytesSent("Network", "Bytes sent");
+
 namespace
 {
 #if defined(WIN32)
@@ -155,7 +158,6 @@ SocketStream::~SocketStream() {
 }
 
 void SocketStream::read(void *ptr, size_t size) {
-	static StatsCounter bytesRcvd("Network", "Bytes received");
 	const size_t total = size;
 	char *data = (char *) ptr;
 	while (size > 0) {
@@ -180,7 +182,6 @@ void SocketStream::read(void *ptr, size_t size) {
 }
 
 void SocketStream::write(const void *ptr, size_t size) {
-	static StatsCounter bytesSent("Network", "Bytes sent");
 	const size_t total = size;
 	char *data = (char *) ptr;
 	while (size > 0) {