diff --git a/dom/network/interfaces/nsIUDPSocketChild.idl b/dom/network/interfaces/nsIUDPSocketChild.idl
index 09035ad6af1..c70c2faa2fb 100644
--- a/dom/network/interfaces/nsIUDPSocketChild.idl
+++ b/dom/network/interfaces/nsIUDPSocketChild.idl
@@ -8,7 +8,11 @@
 interface nsIUDPSocketInternal;
 
 %{ C++
-#include "mozilla/net/DNS.h"
+namespace mozilla {
+namespace net {
+union NetAddr;
+}
+}
 %}
 native NetAddr(mozilla::net::NetAddr);
 [ptr] native NetAddrPtr(mozilla::net::NetAddr);
diff --git a/netwerk/base/public/nsINetAddr.idl b/netwerk/base/public/nsINetAddr.idl
index c41a9b71f19..c7388354d34 100644
--- a/netwerk/base/public/nsINetAddr.idl
+++ b/netwerk/base/public/nsINetAddr.idl
@@ -7,7 +7,11 @@
 #include "nsISupports.idl"
 
 %{ C++
-#include "mozilla/net/DNS.h"
+namespace mozilla {
+namespace net {
+union NetAddr;
+}
+}
 %}
 native NetAddr(mozilla::net::NetAddr);