diff --git a/nx/include/switch/kernel/mutex.h b/nx/include/switch/kernel/mutex.h
index dbc79b7d..e79b9264 100644
--- a/nx/include/switch/kernel/mutex.h
+++ b/nx/include/switch/kernel/mutex.h
@@ -5,8 +5,20 @@
 typedef _LOCK_T Mutex;
 typedef _LOCK_RECURSIVE_T RMutex;
 
+static inline void mutexInit(Mutex* m)
+{
+    *m = 0;
+}
+
 void mutexLock(Mutex* m);
 void mutexUnlock(Mutex* m);
 
+static inline void rmutexInit(RMutex* m)
+{
+    m->lock = 0;
+    m->thread_tag = 0;
+    m->counter = 0;
+}
+
 void rmutexLock(RMutex* m);
 void rmutexUnlock(RMutex* m);
diff --git a/nx/source/system/newlib.c b/nx/source/system/newlib.c
index cc9cd572..876d842b 100644
--- a/nx/source/system/newlib.c
+++ b/nx/source/system/newlib.c
@@ -11,8 +11,10 @@ void newlibSetup() {
     __syscalls.exit = __libnx_exit;
 
     // Register locking syscalls
+    __syscalls.lock_init              = mutexInit;
     __syscalls.lock_acquire           = mutexLock;
     __syscalls.lock_release           = mutexUnlock;
+    __syscalls.lock_init_recursive    = rmutexInit;
     __syscalls.lock_acquire_recursive = rmutexLock;
     __syscalls.lock_release_recursive = rmutexUnlock;
 }