Index: include/vsdd.h
===================================================================
--- include/vsdd.h	(revision ad89950cbfd099ce8cf70cc01f6f25bd773d67f5)
+++ include/vsdd.h	(revision 572daa7c12f5c9498343313d6d5350492c787d9e)
@@ -61,5 +61,5 @@
 			objy;	/* Object y location */
 
-	uint16_t	*obase;	/* Base of object data */
+	volatile	uint16_t	*obase;	/* Base of object data */
 
 	int8_t		opri,	/* Current object priority */