1 files changed, 2 insertions, 2 deletions
diff --git a/tpu.h b/tpu.h
index 3d6aac6..a6b5845 100644
--- a/tpu.h
+++ b/tpu.h
@@ -22,8 +22,8 @@ enum tpu_inst_type {
 };
 
 enum tpu_inst_op_type {
-	OP_ACC, OP_BAK, OP_NIL, OP_LEFT, OP_RIGHT,
-	OP_UP, OP_DOWN, OP_ANY, OP_LAST, OP_LIT, OP_LABEL
+	OP_ACC, OP_NIL, OP_LEFT, OP_RIGHT, OP_UP, OP_DOWN,
+	OP_ANY, OP_LAST, OP_LIT, OP_LABEL
 };
 
 enum tpu_port_dir {