diff --git a/include/psdk/iptypes.h b/include/psdk/iptypes.h
index 12f564b7696..94d81263ad7 100644
--- a/include/psdk/iptypes.h
+++ b/include/psdk/iptypes.h
@@ -78,7 +78,7 @@ typedef struct _FIXED_INFO {
   UINT EnableProxy;
   UINT EnableDns;
 } FIXED_INFO, *PFIXED_INFO;
-#ifdef _WINSOCK2_H
+#ifdef _WINSOCK2API_
 typedef enum {
   IpPrefixOriginOther = 0,
   IpPrefixOriginManual,