structure comparison functions
diff --git a/tests/125-bitstring-constraint-OK.asn1.-P b/tests/125-bitstring-constraint-OK.asn1.-P
index 2a9b2df..f267409 100644
--- a/tests/125-bitstring-constraint-OK.asn1.-P
+++ b/tests/125-bitstring-constraint-OK.asn1.-P
@@ -66,6 +66,7 @@
 	"T",
 	BIT_STRING_free,
 	BIT_STRING_print,
+	BIT_STRING_compare,
 	T_constraint,
 	BIT_STRING_decode_ber,
 	BIT_STRING_encode_der,