#define NSS_STATUS_UNAVAIL NSS_UNAVAIL
#define NSS_STATUS_TRYAGAIN NSS_TRYAGAIN
-#elif HAVE_NSS_H
+#elif defined(HAVE_NSS_H)
/*
* Linux (glibc)
#include <nss.h>
typedef enum nss_status NSS_STATUS;
-#elif HAVE_NS_API_H
+#elif defined(HAVE_NS_API_H)
/*
* SGI IRIX