diff --git a/components/esp_rom/esp32h21/include/esp32h21/rom/libc_stubs.h b/components/esp_rom/esp32h21/include/esp32h21/rom/libc_stubs.h
index 8b2b9ebd63..3b6db54495 100644
--- a/components/esp_rom/esp32h21/include/esp32h21/rom/libc_stubs.h
+++ b/components/esp_rom/esp32h21/include/esp32h21/rom/libc_stubs.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -57,7 +57,6 @@ struct syscall_stub_table
     int (*_write_r)(struct _reent *r, int, const void *, int);
     int (*_lseek_r)(struct _reent *r, int, int, int);
     int (*_read_r)(struct _reent *r, int, void *, int);
-#ifdef _RETARGETABLE_LOCKING
     void (*_retarget_lock_init)(_LOCK_T *lock);
     void (*_retarget_lock_init_recursive)(_LOCK_T *lock);
     void (*_retarget_lock_close)(_LOCK_T lock);
@@ -68,18 +67,6 @@ struct syscall_stub_table
     int (*_retarget_lock_try_acquire_recursive)(_LOCK_T lock);
     void (*_retarget_lock_release)(_LOCK_T lock);
     void (*_retarget_lock_release_recursive)(_LOCK_T lock);
-#else
-    void (*_lock_init)(_lock_t *lock);
-    void (*_lock_init_recursive)(_lock_t *lock);
-    void (*_lock_close)(_lock_t *lock);
-    void (*_lock_close_recursive)(_lock_t *lock);
-    void (*_lock_acquire)(_lock_t *lock);
-    void (*_lock_acquire_recursive)(_lock_t *lock);
-    int (*_lock_try_acquire)(_lock_t *lock);
-    int (*_lock_try_acquire_recursive)(_lock_t *lock);
-    void (*_lock_release)(_lock_t *lock);
-    void (*_lock_release_recursive)(_lock_t *lock);
-#endif
     int (*_printf_float)(struct _reent *data, void *pdata, FILE * fp, int (*pfunc) (struct _reent *, FILE *, const char *, size_t len), va_list * ap);
     int (*_scanf_float) (struct _reent *rptr, void *pdata, FILE *fp, va_list *ap);
     void (*__assert_func) (const char *file, int line, const char * func, const char *failedexpr) __attribute__((noreturn));