1 files changed, 1 insertions, 0 deletions
diff --git a/obj.h b/obj.h
index 43f531b0..776d2030 100644
--- a/obj.h
+++ b/obj.h
@@ -72,6 +72,7 @@
 /* the next macro MUST be called in Constructors: */
 #ifndef NDEBUG /* this means if debug... */
 #	define objConstructSetObjInfo(pThis) \
+		assert(pThis->pObjInfo == NULL); \
 		((obj_t*) (pThis))->pObjInfo = pObjInfoOBJ; \
 		((obj_t*) (pThis))->iObjCooCKiE = 0xBADEFEE
 #else