diff --git a/include/obj.h b/include/obj.h
index 5bcf9d0dc..e118b1d2e 100644
--- a/include/obj.h
+++ b/include/obj.h
@@ -223,9 +223,12 @@ struct obj {
 				 (obj)->otyp == TOUCHSTONE)
 
 /* misc */
+#ifdef KOPS
 #define is_flimsy(otmp)		(objects[(otmp)->otyp].oc_material <= LEATHER || \
 				 (otmp)->otyp == RUBBER_HOSE)
-
+#else
+#define is_flimsy(otmp)		(objects[(otmp)->otyp].oc_material <= LEATHER)
+#endif
 
 /* helpers, simple enough to be macros */
 #define is_plural(o)	((o)->quan > 1 || \