diff --git a/isso/wsgi.py b/isso/wsgi.py
index 864d017..c826289 100644
--- a/isso/wsgi.py
+++ b/isso/wsgi.py
@@ -200,7 +200,11 @@ class SocketHTTPServer(HTTPServer, ThreadingMixIn):
     multiprocess = False
 
     allow_reuse_address = 1
-    address_family = socket.AF_UNIX
+
+    try:
+        address_family = socket.AF_UNIX
+    except AttributeError:
+        address_family = socket.AF_INET
 
     request_queue_size = 128