Index: src/cut.c
===================================================================
--- src/cut.c.orig	2012-04-16 13:17:12.321020103 +0200
+++ src/cut.c	2012-04-16 13:17:12.333019817 +0200
@@ -869,7 +869,10 @@ cut_fields_mb (FILE *stream)
   c = getc (stream);
   empty_input = (c == EOF);
   if (c != EOF)
-    ungetc (c, stream);
+    {
+      ungetc (c, stream);
+      wc = 0;
+    }
   else
     wc = WEOF;