Index: include/vsdd.h
===================================================================
--- include/vsdd.h	(revision ad89950cbfd099ce8cf70cc01f6f25bd773d67f5)
+++ include/vsdd.h	(revision 432327d61294cce757d5a4a7aff568c99952a3b5)
@@ -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 */