diff --git a/mozilla/network/module/nsNetThread.cpp b/mozilla/network/module/nsNetThread.cpp
index e85e973422c..52b34f29f42 100644
--- a/mozilla/network/module/nsNetThread.cpp
+++ b/mozilla/network/module/nsNetThread.cpp
@@ -49,6 +49,7 @@ extern "C" {
 
 
 void RL_Init();
+
 PUBLIC NET_StreamClass * 
 NET_NGLayoutConverter(FO_Present_Types format_out,
                       void *converter_obj,
@@ -57,6 +58,10 @@ NET_NGLayoutConverter(FO_Present_Types format_out,
 
 }; /* end of extern "C" */
 
+#if defined(XP_PC)
+void net_InitAsyncDNS();
+#endif /* XP_PC */
+
 
 /*
  * Initialize our protocols
@@ -95,6 +100,10 @@ nsresult NS_InitNetlib(void)
                                            NET_ChunkedDecoderStream);
     RL_Init();
 
+#if defined(XP_PC)
+    net_InitAsyncDNS();
+#endif /* XP_PC */
+
     return NS_OK;
 }