diff --git a/mopidy/__main__.py b/mopidy/__main__.py
index 1ddd76a4..05394bc2 100644
--- a/mopidy/__main__.py
+++ b/mopidy/__main__.py
@@ -37,7 +37,9 @@ def main():
     logger.info('Starting Mopidy %s', versioning.get_version())
 
     signal.signal(signal.SIGTERM, process.exit_handler)
-    signal.signal(signal.SIGUSR1, pykka.debug.log_thread_tracebacks)
+    # Windows does not have signal.SIGUSR1
+    if hasattr(signal, 'SIGUSR1'):
+        signal.signal(signal.SIGUSR1, pykka.debug.log_thread_tracebacks)
 
     try:
         registry = ext.Registry()
diff --git a/mopidy/utils/network.py b/mopidy/utils/network.py
index bb1edbc4..adfe3b5f 100644
--- a/mopidy/utils/network.py
+++ b/mopidy/utils/network.py
@@ -43,7 +43,12 @@ def create_socket():
     if has_ipv6:
         sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
         # Explicitly configure socket to work for both IPv4 and IPv6
-        sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
+        if (hasattr(socket, 'IPPROTO_IPV6')):
+            sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
+        else:
+            # Python 2.7 on windows does not have the IPPROTO_IPV6 constant
+            # Use values extracted from Windows Vista/7/8's header
+            sock.setsockopt(41, 27, 0)
     else:
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
     sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)