diff --git a/skeletons/BMPString.c b/skeletons/BMPString.c
index bdbd40d..2a11299 100644
--- a/skeletons/BMPString.c
+++ b/skeletons/BMPString.c
@@ -28,7 +28,6 @@
 	asn1_DEF_BMPString_tags,
 	sizeof(asn1_DEF_BMPString_tags)
 	  / sizeof(asn1_DEF_BMPString_tags[0]),
-	-1,	/* Both ways are fine */
 	0, 0,	/* No members */
 	0	/* No specifics */
 };
@@ -101,7 +100,8 @@
 	(void)td;	/* Unused argument */
 	(void)ilevel;	/* Unused argument */
 
-	if(!st || !st->buf) return cb("<absent>", 8, app_key);
+	if(!st || !st->buf)
+		return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
 
 	if(BMPString__dump(st, cb, app_key) < 0)
 		return -1;