@@ -693,10 +693,14 @@
 AS_IF([test x"$enable_files" != x"no"], [
 	AC_DEFINE(OF_HAVE_FILES, 1, [Whether we have files])
 	AC_SUBST(USE_SRCS_FILES, '${SRCS_FILES}')
 	AC_SUBST(OFHASH, "ofhash")
 	AC_SUBST(OFZIP, "ofzip")
+
+	AC_CHECK_TYPE(off64_t, [
+		AC_DEFINE(OF_HAVE_OFF64_T, 1, [Whether we have off64_t])
+	])
 
 	AC_CHECK_FUNCS(readdir_r)
 ])
 
 AC_CHECK_FUNCS([sysconf gmtime_r localtime_r nanosleep lstat])