diff --git a/src/gallium/drivers/r300/compiler/radeon_program_constants.h b/src/gallium/drivers/r300/compiler/radeon_program_constants.h
index 6a8cbe333bf..4c12c5f2e67 100644
--- a/src/gallium/drivers/r300/compiler/radeon_program_constants.h
+++ b/src/gallium/drivers/r300/compiler/radeon_program_constants.h
@@ -101,7 +101,7 @@ enum {
 	RC_NUM_SPECIAL_REGISTERS
 };
 
-#define RC_REGISTER_INDEX_BITS 10
+#define RC_REGISTER_INDEX_BITS 11
 #define RC_REGISTER_MAX_INDEX (1 << RC_REGISTER_INDEX_BITS)
 
 typedef enum {