diff --git a/gio/gwin32networkmonitor.c b/gio/gwin32networkmonitor.c
index 9dd5da757..e219225f0 100644
--- a/gio/gwin32networkmonitor.c
+++ b/gio/gwin32networkmonitor.c
@@ -78,24 +78,24 @@ g_win32_network_monitor_init (GWin32NetworkMonitor *win)
 }
 
 static gboolean
-win_network_monitor_get_ip_info (IP_ADDRESS_PREFIX  prefix,
-                                 GSocketFamily     *family,
-                                 const guint8     **dest,
-                                 gsize             *len)
+win_network_monitor_get_ip_info (const IP_ADDRESS_PREFIX  *prefix,
+                                 GSocketFamily            *family,
+                                 const guint8            **dest,
+                                 gsize                    *len)
 {
-  switch (prefix.Prefix.si_family)
+  switch (prefix->Prefix.si_family)
     {
       case AF_UNSPEC:
         /* Fall-through: AF_UNSPEC deliveres both IPV4 and IPV6 infos, let`s stick with IPV4 here */
       case AF_INET:
         *family = G_SOCKET_FAMILY_IPV4;
-        *dest = (guint8 *) &prefix.Prefix.Ipv4.sin_addr;
-        *len = prefix.PrefixLength;
+        *dest = (guint8 *) &(prefix->Prefix.Ipv4.sin_addr);
+        *len = prefix->PrefixLength;
         break;
       case AF_INET6:
         *family = G_SOCKET_FAMILY_IPV6;
-        *dest = (guint8 *) &prefix.Prefix.Ipv6.sin6_addr;
-        *len = prefix.PrefixLength;
+        *dest = (guint8 *) &(prefix->Prefix.Ipv6.sin6_addr);
+        *len = prefix->PrefixLength;
         break;
       default:
         return FALSE;
@@ -152,7 +152,7 @@ win_network_monitor_process_table (GWin32NetworkMonitor  *win,
 
       route = routes->Table + i;
 
-      if (!win_network_monitor_get_ip_info (route->DestinationPrefix, &family, &dest, &len))
+      if (!win_network_monitor_get_ip_info (&route->DestinationPrefix, &family, &dest, &len))
         continue;
 
       network = get_network_mask (family, dest, len);
@@ -218,13 +218,13 @@ win_network_monitor_invoke_route_changed (gpointer user_data)
   switch (route_data->type)
     {
       case MibDeleteInstance:
-        if (!win_network_monitor_get_ip_info (route_data->route->DestinationPrefix, &family, &dest, &len))
+        if (!win_network_monitor_get_ip_info (&route_data->route->DestinationPrefix, &family, &dest, &len))
           break;
 
         remove_network (route_data->win, family, dest, len);
         break;
       case MibAddInstance:
-        if (!win_network_monitor_get_ip_info (route_data->route->DestinationPrefix, &family, &dest, &len))
+        if (!win_network_monitor_get_ip_info (&route_data->route->DestinationPrefix, &family, &dest, &len))
             break;
 
         add_network (route_data->win, family, dest, len);