Index: src/cut.c
===================================================================
--- src/cut.c.orig	2010-11-11 16:28:46.581137538 +0100
+++ src/cut.c	2010-11-11 16:30:04.886974551 +0100
@@ -868,7 +868,10 @@ 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;