diff --git a/src/tests/test-ranap.c b/src/tests/test-ranap.c
index addc14f..d00f583 100644
--- a/src/tests/test-ranap.c
+++ b/src/tests/test-ranap.c
@@ -78,6 +78,7 @@
 	printf("Decoded Cause Misc=%u\n", c_dec->choice.misc);
 	OSMO_ASSERT(c_dec->present == RANAP_Cause_PR_misc);
 	OSMO_ASSERT(c_dec->choice.misc == inp);
+	ASN_STRUCT_FREE(asn_DEF_RANAP_Cause, c_dec);
 }
 
 int main(int argc, char **argv)