diff --git a/skeletons/BOOLEAN.c b/skeletons/BOOLEAN.c
index 1bf79db..060edca 100644
--- a/skeletons/BOOLEAN.c
+++ b/skeletons/BOOLEAN.c
@@ -41,6 +41,7 @@
 	sizeof(asn_DEF_BOOLEAN_tags) / sizeof(asn_DEF_BOOLEAN_tags[0]),
 	asn_DEF_BOOLEAN_tags,	/* Same as above */
 	sizeof(asn_DEF_BOOLEAN_tags) / sizeof(asn_DEF_BOOLEAN_tags[0]),
+	0,	/* No OER visible constraints */
 	0,	/* No PER visible constraints */
 	0, 0,	/* No members */
 	0	/* No specifics */