diff --git a/klippy/chelper/__init__.py b/klippy/chelper/__init__.py
index 3a7ddf4eb..d3366044d 100644
--- a/klippy/chelper/__init__.py
+++ b/klippy/chelper/__init__.py
@@ -36,9 +36,10 @@ defs_stepcompress = """
         int step_count, interval, add;
     };
 
-    struct stepcompress *stepcompress_alloc(uint32_t oid, char name[16]);
-    void stepcompress_fill(struct stepcompress *sc, uint32_t max_error
-        , int32_t queue_step_msgtag, int32_t set_next_step_dir_msgtag);
+    struct stepcompress *stepcompress_alloc(char name[16]);
+    void stepcompress_fill(struct stepcompress *sc, uint32_t oid
+        , uint32_t max_error, int32_t queue_step_msgtag
+        , int32_t set_next_step_dir_msgtag);
     void stepcompress_set_invert_sdir(struct stepcompress *sc
         , uint32_t invert_sdir);
     void stepcompress_free(struct stepcompress *sc);
diff --git a/klippy/chelper/stepcompress.c b/klippy/chelper/stepcompress.c
index ab261d129..1a592173e 100644
--- a/klippy/chelper/stepcompress.c
+++ b/klippy/chelper/stepcompress.c
@@ -258,13 +258,12 @@ static void sc_thread_free(struct stepcompress *sc);
 
 // Allocate a new 'stepcompress' object
 struct stepcompress * __visible
-stepcompress_alloc(uint32_t oid, char name[16])
+stepcompress_alloc(char name[16])
 {
     struct stepcompress *sc = malloc(sizeof(*sc));
     memset(sc, 0, sizeof(*sc));
     list_init(&sc->msg_queue);
     list_init(&sc->history_list);
-    sc->oid = oid;
     sc->sdir = -1;
 
     int ret = sc_thread_alloc(sc, name);
@@ -275,9 +274,10 @@ stepcompress_alloc(uint32_t oid, char name[16])
 
 // Fill message id information
 void __visible
-stepcompress_fill(struct stepcompress *sc, uint32_t max_error
+stepcompress_fill(struct stepcompress *sc, uint32_t oid, uint32_t max_error
                   , int32_t queue_step_msgtag, int32_t set_next_step_dir_msgtag)
 {
+    sc->oid = oid;
     sc->max_error = max_error;
     sc->queue_step_msgtag = queue_step_msgtag;
     sc->set_next_step_dir_msgtag = set_next_step_dir_msgtag;
diff --git a/klippy/chelper/stepcompress.h b/klippy/chelper/stepcompress.h
index 5ebf8bf08..413446daf 100644
--- a/klippy/chelper/stepcompress.h
+++ b/klippy/chelper/stepcompress.h
@@ -11,8 +11,8 @@ struct pull_history_steps {
     int step_count, interval, add;
 };
 
-struct stepcompress *stepcompress_alloc(uint32_t oid, char name[16]);
-void stepcompress_fill(struct stepcompress *sc, uint32_t max_error
+struct stepcompress *stepcompress_alloc(char name[16]);
+void stepcompress_fill(struct stepcompress *sc, uint32_t oid, uint32_t max_error
                        , int32_t queue_step_msgtag
                        , int32_t set_next_step_dir_msgtag);
 void stepcompress_set_invert_sdir(struct stepcompress *sc
diff --git a/klippy/extras/motion_queuing.py b/klippy/extras/motion_queuing.py
index d981dcb58..8fa562621 100644
--- a/klippy/extras/motion_queuing.py
+++ b/klippy/extras/motion_queuing.py
@@ -69,10 +69,10 @@ class PrinterMotionQueuing:
         ffi_main, ffi_lib = chelper.get_ffi()
         return ffi_lib.trapq_append
     # C steppersync tracking
-    def allocate_stepcompress(self, mcu, oid, name):
+    def allocate_stepcompress(self, mcu, name):
         name = name.encode("utf-8")[:15]
         ffi_main, ffi_lib = chelper.get_ffi()
-        sc = ffi_main.gc(ffi_lib.stepcompress_alloc(oid, name),
+        sc = ffi_main.gc(ffi_lib.stepcompress_alloc(name),
                          ffi_lib.stepcompress_free)
         self.stepcompress.append((mcu, sc))
         return sc
diff --git a/klippy/extras/pwm_tool.py b/klippy/extras/pwm_tool.py
index cec7e3791..dfa5c682b 100644
--- a/klippy/extras/pwm_tool.py
+++ b/klippy/extras/pwm_tool.py
@@ -14,12 +14,11 @@ class MCU_queued_pwm:
         self._hardware_pwm = False
         self._cycle_time = 0.100
         self._max_duration = 2.
-        self._oid = oid = mcu.create_oid()
+        self._oid = mcu.create_oid()
         printer = mcu.get_printer()
         sname = config.get_name().split()[-1]
         self._motion_queuing = printer.load_object(config, 'motion_queuing')
-        self._stepqueue = self._motion_queuing.allocate_stepcompress(
-            mcu, oid, sname)
+        self._stepqueue = self._motion_queuing.allocate_stepcompress(mcu, sname)
         ffi_main, ffi_lib = chelper.get_ffi()
         self._stepcompress_queue_mq_msg = ffi_lib.stepcompress_queue_mq_msg
         mcu.register_config_callback(self._build_config)
diff --git a/klippy/stepper.py b/klippy/stepper.py
index 046b5280d..deb73769e 100644
--- a/klippy/stepper.py
+++ b/klippy/stepper.py
@@ -29,7 +29,7 @@ class MCU_stepper:
         self._units_in_radians = units_in_radians
         self._step_dist = rotation_dist / steps_per_rotation
         self._mcu = mcu = step_pin_params['chip']
-        self._oid = oid = mcu.create_oid()
+        self._oid = mcu.create_oid()
         mcu.register_config_callback(self._build_config)
         self._step_pin = step_pin_params['pin']
         self._invert_step = step_pin_params['invert']
@@ -45,7 +45,7 @@ class MCU_stepper:
         self._active_callbacks = []
         motion_queuing = printer.load_object(config, 'motion_queuing')
         sname = self._name.split()[-1]
-        self._stepqueue = motion_queuing.allocate_stepcompress(mcu, oid, sname)
+        self._stepqueue = motion_queuing.allocate_stepcompress(mcu, sname)
         ffi_main, ffi_lib = chelper.get_ffi()
         ffi_lib.stepcompress_set_invert_sdir(self._stepqueue, self._invert_dir)
         self._stepper_kinematics = None
@@ -123,7 +123,7 @@ class MCU_stepper:
         max_error = self._mcu.get_max_stepper_error()
         max_error_ticks = self._mcu.seconds_to_clock(max_error)
         ffi_main, ffi_lib = chelper.get_ffi()
-        ffi_lib.stepcompress_fill(self._stepqueue, max_error_ticks,
+        ffi_lib.stepcompress_fill(self._stepqueue, self._oid, max_error_ticks,
                                   step_cmd_tag, dir_cmd_tag)
     def get_oid(self):
         return self._oid