#ifdef HAVE_GSSAPI_GSSAPI_EXT_H
#include <gssapi/gssapi_ext.h>
-#elif HAVE_GSSAPI_GSSAPI_H
+#elif defined(HAVE_GSSAPI_GSSAPI_H)
#include <gssapi/gssapi.h>
-#elif HAVE_GSSAPI_GSSAPI_GENERIC_H
+#elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
#include <gssapi/gssapi_generic.h>
-#elif HAVE_GSSAPI_H
+#elif defined(HAVE_GSSAPI_H)
#include <gssapi.h>
#endif
#ifdef HAVE_GSSAPI_GSSAPI_SPNEGO_H
#include <gssapi/gssapi_spnego.h>
-#elif HAVE_GSSAPI_SPNEGO_H
+#elif defined(HAVE_GSSAPI_SPNEGO_H)
#include <gssapi_spnego.h>
#endif