Index: include/vsdd.h
===================================================================
--- include/vsdd.h	(revision 7bb128412e0dc849eabb8e70946421b6b86d24c6)
+++ include/vsdd.h	(revision 6a37d5b75a66b9b08989170e2619867e2219e59d)
@@ -55,5 +55,5 @@
 struct octent {			/* Object control table entry */
 
-	uint16_t	ysize,	/* Height of object in pixels */
+	int16_t		ysize,	/* Height of object in pixels */
 			xsize;	/* Width of object in pixels */