diff --git a/README b/README
index c53be52..fddc9ac 100644
--- a/README
+++ b/README
@@ -67,7 +67,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
 =*| sleep           yes                          none
     sort            no                           -m, -o, -d, -f, -i
 =*  split           yes                          none
-=*  sponge          non-posix                    none
+=*| sponge          non-posix                    none
 #*  strings         yes                          none
 =*  sync            non-posix                    none
 =*  tail            yes                          none
diff --git a/sponge.c b/sponge.c
index ee21c27..bcc0f7a 100644
--- a/sponge.c
+++ b/sponge.c
@@ -7,7 +7,7 @@
 static void
 usage(void)
 {
-	eprintf("usage: sponge file\n");
+	eprintf("usage: %s file\n", argv0);
 }
 
 int
@@ -25,7 +25,6 @@ main(int argc, char *argv[])
 
 	if (!(tmpfp = tmpfile()))
 		eprintf("tmpfile:");
-
 	concat(stdin, "<stdin>", tmpfp, "<tmpfile>");
 	rewind(tmpfp);