diff --git a/include/sigar_private.h b/include/sigar_private.h
index 6a50dab6..ff35a794 100644
--- a/include/sigar_private.h
+++ b/include/sigar_private.h
@@ -239,20 +239,21 @@ int sigar_get_iftype(const char *name, int *type, int *inst);
 #define SIGAR_NIC_ETHERNET "Ethernet"
 #define SIGAR_NIC_NETROM   "AMPR NET/ROM"
 
-#ifdef WIN32
-#else
+#ifndef WIN32
 #include <netdb.h>
 #endif
 
-#define SIGAR_GETHOSTBYNAME_LEN 512
+#define SIGAR_HOSTENT_LEN 512
 #if defined(__hpux) || defined(_AIX)
 #define SIGAR_HAS_HOSTENT_DATA
 #endif
 
 typedef struct {
-    char buffer[SIGAR_GETHOSTBYNAME_LEN];
-    struct hostent hs;
+    char buffer[SIGAR_HOSTENT_LEN];
     int error;
+#ifndef WIN32
+    struct hostent hs;
+#endif
 #ifdef SIGAR_HAS_HOSTENT_DATA
     struct hostent_data hd;
 #endif