diff --git a/include/var.h b/include/var.h
index 9fe13de5..8a5efbd0 100644
--- a/include/var.h
+++ b/include/var.h
@@ -50,6 +50,7 @@
 
 #define	V_ITEM(x)	((x)|VT_ITEM)	/* a moveable, sellable(?) commodity */
 
+#define I_NONE		0
 #define I_CIVIL		1
 #define I_MILIT		2
 #define I_SHELL		3