diff -u nano/utils.c nano-andrzej/utils.c
--- nano/utils.c	Wed Oct 16 22:19:31 2002
+++ nano-andrzej/utils.c	Tue Dec  3 18:52:55 2002
@@ -32,10 +32,8 @@
 
 int is_cntrl_char(int c)
 {
-    if (iscntrl(c) || ((c & 127) != 127 && iscntrl(c & 127)))
-	return 1;
-    else
-	return 0;
+    return (-128 <= c && c < -96) || (0 <= c && c < 32) ||
+		(127 <= c && c < 160);
 }
 
 int num_of_digits(int n)