Another typo (sigh\!)
@@ -164,7 +164,7 @@ static const H5FD_class_t H5FD_http_g = {
"http", /* name */
MAXADDR, /* maxaddr */
H5F_CLOSE_WEAK, /* fc_degree */
-#ifndef HDF5CLASS1
+#ifndef H5FDCLASS1
H5FD_http_term, /* terminate */
#endif
NULL, /* sb_size */
