diff --git a/tests/19-param-OK.asn1.-P b/tests/19-param-OK.asn1.-P
index c69a75b..5f31e82 100644
--- a/tests/19-param-OK.asn1.-P
+++ b/tests/19-param-OK.asn1.-P
@@ -105,6 +105,7 @@
 	-1,	/* Start extensions */
 	-1	/* Stop extensions */
 };
+static /* Use -fall-defs-global to expose */
 asn1_TYPE_descriptor_t asn1_DEF_toBeSigned = {
 	"toBeSigned",
 	SEQUENCE_constraint,