diff --git a/shared-core/r300_cmdbuf.c b/shared-core/r300_cmdbuf.c
index d3c52d43..c02334a2 100644
--- a/shared-core/r300_cmdbuf.c
+++ b/shared-core/r300_cmdbuf.c
@@ -155,7 +155,7 @@ void r300_init_reg_flags(void)
 	ADD_RANGE(R300_VAP_INPUT_CNTL_0, 2);
 	ADD_RANGE(0x21DC, 1);
 	ADD_RANGE(R300_VAP_UNKNOWN_221C, 1);
-	ADD_RANGE(0x2220, 4);
+	ADD_RANGE(R300_VAP_CLIP_X_0, 4);
 	ADD_RANGE(R300_VAP_UNKNOWN_2288, 1);
 	ADD_RANGE(R300_VAP_OUTPUT_VTX_FMT_0, 2);
 	ADD_RANGE(R300_VAP_PVS_CNTL_1, 3);