diff --git a/src/third_party/asn1/AvatarHash.c b/src/third_party/asn1/AvatarHash.c
index 29f1c884..e2f6650f 100644
--- a/src/third_party/asn1/AvatarHash.c
+++ b/src/third_party/asn1/AvatarHash.c
@@ -23,7 +23,7 @@ AvatarHash_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
 	
 	size = st->size;
 	
-	if((size == 20)) {
+	if((size == 16)) {
 		/* Constraint check succeeded */
 		return 0;
 	} else {