diff --git a/src/sim/core.c b/src/sim/core.c
index d1d4de7..dba378b 100644
--- a/src/sim/core.c
+++ b/src/sim/core.c
@@ -290,3 +290,15 @@
 
 	return csw->class;
 }
+
+int default_decode(struct osim_decoded_data *dd,
+		   const struct osim_file_desc *desc,
+		   int len, uint8_t *data)
+{
+	struct osim_decoded_element *elem;
+
+	elem = element_alloc(dd, "Unknown Payload", ELEM_T_BYTES, ELEM_REPR_HEX);
+	elem->u.buf = talloc_memdup(elem, data, len);
+
+	return 0;
+}