diff --git a/shared-core/radeon_cs.c b/shared-core/radeon_cs.c
index 040b799..7e80f10 100644
--- a/shared-core/radeon_cs.c
+++ b/shared-core/radeon_cs.c
@@ -328,6 +328,9 @@ static inline int r600_cs_packet0(struct drm_radeon_cs_parser *parser, uint32_t
 		case AVIVO_D2MODE_VLINE_START_END:
 			ret = 0;
 			break;
+		case R600_SCRATCH_REG2: /* FIXME: needed for buffer aging in mesa for now */
+			ret = 0;
+			break;
 		default:
 			ret = -EINVAL;
 			DRM_ERROR("bad packet 0 reg: 0x%08x\n", reg);