diff --git a/libctru/source/os.c b/libctru/source/os.c
index 29ad36a..a52e18d 100644
--- a/libctru/source/os.c
+++ b/libctru/source/os.c
@@ -164,11 +164,8 @@ void osSetSpeedupEnable(bool enable)
 	__ctru_speedup_config();
 }
 
-int usleep(useconds_t useconds)
+int __libctru_nanosleep(const struct timespec *req, struct timespec *rem)
 {
-
-	svcSleepThread(useconds * 1000ull);
-
+	svcSleepThread(req->tv_sec * 1000000000ull + req->tv_nsec);
 	return 0;
-
 }
diff --git a/libctru/source/system/syscalls.c b/libctru/source/system/syscalls.c
index a0c2903..fab453a 100644
--- a/libctru/source/system/syscalls.c
+++ b/libctru/source/system/syscalls.c
@@ -12,6 +12,7 @@
 
 void __ctru_exit(int rc);
 int __libctru_gtod(struct _reent *ptr, struct timeval *tp, struct timezone *tz);
+int __libctru_nanosleep(const struct timespec *req, struct timespec *rem);
 
 extern const u8 __tdata_lma[];
 extern const u8 __tdata_lma_end[];
@@ -34,7 +35,8 @@ void __system_initSyscalls(void)
 	__syscalls.exit     = __ctru_exit;
 	__syscalls.gettod_r = __libctru_gtod;
 	__syscalls.getreent = __ctru_get_reent;
-
+	__syscalls.nanosleep = __libctru_nanosleep;
+	
 	// Register locking syscalls
 	__syscalls.lock_init                  = LightLock_Init;
 	__syscalls.lock_acquire               = LightLock_Lock;