diff --git a/tests/39-sequence-of-OK.asn1.-P b/tests/39-sequence-of-OK.asn1.-P
index 6a8553b..9a49a79 100644
--- a/tests/39-sequence-of-OK.asn1.-P
+++ b/tests/39-sequence-of-OK.asn1.-P
@@ -45,6 +45,7 @@
 	sizeof(struct collection),
 	offsetof(struct collection, _ber_dec_ctx),
 };
+static /* Use -fall-defs-global to expose */
 asn1_TYPE_descriptor_t asn1_DEF_collection = {
 	"collection",
 	SEQUENCE_OF_constraint,