diff --git a/shared-core/radeon_drm.h b/shared-core/radeon_drm.h
index e9f2afaf..3fc417a9 100644
--- a/shared-core/radeon_drm.h
+++ b/shared-core/radeon_drm.h
@@ -303,6 +303,7 @@ typedef union {
 #define RADEON_INDEX_PRIM_OFFSET	20
 
 #define RADEON_SCRATCH_REG_OFFSET	32
+#define R600_SCRATCH_REG_OFFSET         256
 
 #define RADEON_NR_SAREA_CLIPRECTS	12