--- src/crc32.c.orig	2002-09-27 00:39:18.000000000 +1000
+++ src/crc32.c	2019-04-25 06:30:23.000000000 +1000
@@ -16,6 +16,10 @@
    the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #include "system.h"
 #include "crc32.h"