diff --git a/tai_sff/Makefile b/tai_sff/Makefile
index 38173f3..801c92a 100644
--- a/tai_sff/Makefile
+++ b/tai_sff/Makefile
@@ -61,7 +61,7 @@ cmd:
 docker:
 	TAI_DOCKER_CMD="make" $(MAKE) cmd
 
-docker-image:
+builder:
 	$(MAKE) -C $(TAI_DIR) $@
 
 bash:
diff --git a/tai_sff/README.md b/tai_sff/README.md
index 05af370..dfd69aa 100644
--- a/tai_sff/README.md
+++ b/tai_sff/README.md
@@ -74,7 +74,7 @@ module(/sys/bus/i2c/devices/18-0050)/netif(0)>
 
 ```
 $ git submodule update --init
-$ make docker-image
+$ make builder
 $ make docker
 ```
 
diff --git a/tai_sff/oopt-tai b/tai_sff/oopt-tai
index 4b9066f..e88a2d9 160000
--- a/tai_sff/oopt-tai
+++ b/tai_sff/oopt-tai
@@ -1 +1 @@
-Subproject commit 4b9066fd57b7eef147184a8ef25c8f85b0b23528
+Subproject commit e88a2d99cd6ab3b89799060c2f64b54fc256db7a
diff --git a/tai_sff/sff_fsm.cpp b/tai_sff/sff_fsm.cpp
index b4bb2a3..fd39036 100644
--- a/tai_sff/sff_fsm.cpp
+++ b/tai_sff/sff_fsm.cpp
@@ -101,7 +101,7 @@ namespace tai::sff {
                 return TAI_STATUS_OBJECT_IN_USE;
             }
         }
-        transite(FSM_STATE_END);
+        transit(FSM_STATE_END);
         while(true) {
             auto s = get_state();
             if ( s == FSM_STATE_END ) {