diff --git a/tools/vsh-table.c b/tools/vsh-table.c
index 9008b0d431e5bcdfaaf2ebd6519f7d694f7e9a75..28072c971948015af575cc856ba1df66f691c7c2 100644
--- a/tools/vsh-table.c
+++ b/tools/vsh-table.c
@@ -226,7 +226,7 @@ vshTableSafeEncode(const char *s, size_t *width)
 
     while (p && *p) {
         if ((*p == '\\' && *(p + 1) == 'x') ||
-            c_iscntrl(*p)) {
+            g_ascii_iscntrl(*p)) {
             g_snprintf(buf, HEX_ENCODE_LENGTH + 1, "\\x%02x", *p);
             buf += HEX_ENCODE_LENGTH;
             *width += HEX_ENCODE_LENGTH;