diff --git a/include/ws2def.h b/include/ws2def.h
index 5ea8ff337c4..cbd6f741fce 100644
--- a/include/ws2def.h
+++ b/include/ws2def.h
@@ -115,11 +115,11 @@ typedef struct addrinfoexA {
     int ai_family;
     int ai_socktype;
     int ai_protocol;
-    size_t ai_addrlen;
+    SIZE_T ai_addrlen;
     char *ai_canonname;
-    struct sockaddr *ai_addr;
+    struct WS(sockaddr) *ai_addr;
     void *ai_blob;
-    size_t ai_bloblen;
+    SIZE_T ai_bloblen;
     GUID *ai_provider;
     struct addrinfoexA *ai_next;
 } ADDRINFOEXA, *PADDRINFOEXA, *LPADDRINFOEXA;
@@ -129,11 +129,11 @@ typedef struct addrinfoexW {
     int ai_family;
     int ai_socktype;
     int ai_protocol;
-    size_t ai_addrlen;
+    SIZE_T ai_addrlen;
     WCHAR *ai_canonname;
-    struct sockaddr *ai_addr;
+    struct WS(sockaddr) *ai_addr;
     void *ai_blob;
-    size_t ai_bloblen;
+    SIZE_T ai_bloblen;
     GUID *ai_provider;
     struct addrinfoexW *ai_next;
 } ADDRINFOEXW, *PADDRINFOEXW, *LPADDRINFOEXW;