diff --git a/bacnet-stack/ports/win32/bip-init.c b/bacnet-stack/ports/win32/bip-init.c
index 01592a8b..0bd71bb6 100644
--- a/bacnet-stack/ports/win32/bip-init.c
+++ b/bacnet-stack/ports/win32/bip-init.c
@@ -123,7 +123,7 @@ void bip_set_interface(char *ifname)
 static char *winsock_error_code_text(int code)
 {
     switch (code) {
-        case 10013:
+        case WSAEACCES:
             return "Permission denied.";
         case WSAEINTR: 
             return "Interrupted system call.";