diff --git a/skeletons/BIT_STRING.c b/skeletons/BIT_STRING.c
index e21594a..8c83d68 100644
--- a/skeletons/BIT_STRING.c
+++ b/skeletons/BIT_STRING.c
@@ -124,6 +124,8 @@
 
 	if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1);
 
+	er.structure_ptr = 0;
+	er.failed_type = 0;
 	return er;
 cb_failed:
 	_ASN_ENCODE_FAILED;