diff --git a/libio/tst-widetext.c b/libio/tst-widetext.c
index acab72b..a591159 100644
--- a/libio/tst-widetext.c
+++ b/libio/tst-widetext.c
@@ -292,7 +292,7 @@ do_test (void)
       if (fgetws (wcp, &wc2buf[wcsize] - wcp + 1, fp) == NULL)
 	{
 	  printf ("%u: short read using fgetws (only %Zd of %Zd)\n",
-		  __LINE__, wcp - wc2buf, wcsize);
+		  __LINE__, (ssize_t) (wcp - wc2buf), wcsize);
 	  status = 1;
 	  break;
 	}