diff --git a/ncdc/src/util.c b/ncdc/src/util.c
index a357997..1cd87f1 100644
--- a/ncdc/src/util.c
+++ b/ncdc/src/util.c
@@ -20,7 +20,7 @@ wchar_t *util_readkey(int e)
     switch (esc[1]) {
     /* here it depends on the next character we read
      */
-    case L'[': len = 3; break;
+    case L'[': len = 4; break;
     /* O codes move the cursor, and have one additional bit set
      */
     case L'O': len = 1; break;