--- opensshlib/configure.orig	2019-08-24 22:25:32 UTC
+++ opensshlib/configure
@@ -8922,7 +8922,7 @@ main ()
 
 	int a=0, b=0, c=0, d=0, n, v;
 	n = sscanf(ZLIB_VERSION, "%d.%d.%d.%d", &a, &b, &c, &d);
-	if (n != 3 && n != 4)
+	if (n < 2 || n > 4)
 		exit(1);
 	v = a*1000000 + b*10000 + c*100 + d;
 	fprintf(stderr, "found zlib version %s (%d)\n", ZLIB_VERSION, v);