diff -ur lynx2.8.9dev.15.orig/WWW/Library/Implementation/HTUtils.h lynx2.8.9dev.15/WWW/Library/Implementation/HTUtils.h
--- lynx2.8.9dev.15.orig/WWW/Library/Implementation/HTUtils.h	Sun Jul  2 22:40:14 2017
+++ lynx2.8.9dev.15/WWW/Library/Implementation/HTUtils.h	Fri Jul  7 17:50:11 2017
@@ -585,7 +585,7 @@
  * Printing/scanning-formats for "off_t", as well as cast needed to fit.
  */
 #if defined(HAVE_LONG_LONG) && defined(HAVE_INTTYPES_H) && defined(SIZEOF_OFF_T)
-#if (SIZEOF_OFF_T == 8) && defined(PRId64)
+#if (SIZEOF_OFF_T == 8) && defined(PRId64) && defined(SCNd64)
 
 #define PRI_off_t	PRId64
 #define SCN_off_t	SCNd64