diff --git a/library/x509.c b/library/x509.c
index 4c2f721..e969b8d 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -787,7 +787,7 @@
                 break;
 
             c = name->val.p[i];
-            if( c < 32 || c == 127 || ( c > 128 && c < 160 ) )
+            if( c < 32 || c >= 127 )
                  s[i] = '?';
             else s[i] = c;
         }