diff --git a/src/sis_video.h b/src/sis_video.h
index 01a26fa..64a85f9 100644
--- a/src/sis_video.h
+++ b/src/sis_video.h
@@ -163,7 +163,7 @@ extern int	SISGetPortUtilAttribute(ScrnInfoPtr pScrn,  Atom attribute,
 #define IMAGE_MAX_WIDTH_315   1920
 #define IMAGE_MAX_WIDTH_340   1920	/* ? */
 #define IMAGE_MAX_WIDTH_761   1920	/* ? */
-#define IMAGE_MAX_HEIGHT_315  1080
+#define IMAGE_MAX_HEIGHT_315  1088
 
 #define OVERLAY_MIN_WIDTH       32  	/* Minimum overlay sizes */
 #define OVERLAY_MIN_HEIGHT      24