portability
diff --git a/skeletons/OBJECT_IDENTIFIER.c b/skeletons/OBJECT_IDENTIFIER.c
index 0f71307..216aed8 100644
--- a/skeletons/OBJECT_IDENTIFIER.c
+++ b/skeletons/OBJECT_IDENTIFIER.c
@@ -509,9 +509,13 @@
* These require special treatment.
*/
{
- uint8_t first_value[1 + arc_type_size]; /* of two arcs */
- uint8_t *fv = first_value;
uint8_t *tp;
+#ifdef __GNUC__
+ uint8_t first_value[1 + arc_type_size]; /* of two arcs */
+#else
+ uint8_t *first_value = alloca(1 + arc_type_size);
+#endif
+ uint8_t *fv = first_value;
/*
* Simulate first_value = arc0 * 40 + arc1;