diff --git a/nx/include/switch/services/usbhs.h b/nx/include/switch/services/usbhs.h
index 72c008bd..6cc01e85 100644
--- a/nx/include/switch/services/usbhs.h
+++ b/nx/include/switch/services/usbhs.h
@@ -82,7 +82,7 @@ typedef struct {
     Result res;
     u32 requestedSize;
     u32 transferredSize;
-    u64 unk_x10;
+    u64 id;                  ///< id from \ref usbHsEpPostBufferAsync.
 } UsbHsXferReport;
 
 typedef struct {
@@ -247,9 +247,10 @@ static inline Event* usbHsEpGetXferEvent(UsbHsClientEpSession* s) {
  * @param[in] s The endpoint object.
  * @param buffer Data buffer. The buffer address and size should be aligned to 0x1000-bytes.
  * @param[in] size The actual data size.
+ * @param[in] id This is an arbitrary value which will be later returned in \ref UsbHsXferReport. For example a value starting at 0 can be used, then if sending multiple requests at once this value can be incremented each time (with 0 for the first request in this set of requests).
  * @param[out] xferId Output xferId.
  */
-Result usbHsEpPostBufferAsync(UsbHsClientEpSession* s, void* buffer, u32 size, u32* xferId);
+Result usbHsEpPostBufferAsync(UsbHsClientEpSession* s, void* buffer, u32 size, u64 id, u32* xferId);
 
 /**
  * @brief Gets an array of \ref UsbHsXferReport for the specified endpoint. This should be used after waiting on the Event from \ref usbHsEpGetXferEvent.
@@ -277,11 +278,12 @@ Result usbHsEpPostBuffer(UsbHsClientEpSession* s, void* buffer, u32 size, u32* t
  * @param buffer Data buffer. The buffer address and size should be aligned to 0x1000-bytes.
  * @param[in] urbs Input array of u32s for the size of each urb.
  * @param[in] urbCount Total entries in the urbs array.
+ * @param[in] id Same as \ref usbHsEpPostBufferAsync.
  * @param[in] unk1 \ref usbHsEpPostBufferAsync would internally pass value 0 here.
  * @param[in] unk2 \ref usbHsEpPostBufferAsync would internally pass value 0 here.
  * @param[out] xferId Output xferId.
  */
-Result usbHsEpBatchBufferAsync(UsbHsClientEpSession* s, void* buffer, u32* urbs, u32 urbCount, u32 unk1, u32 unk2, u32* xferId);
+Result usbHsEpBatchBufferAsync(UsbHsClientEpSession* s, void* buffer, u32* urbs, u32 urbCount, u64 id, u32 unk1, u32 unk2, u32* xferId);
 
 /**
  * @brief This can be used to map the specified buffer as devicemem, which can then be used with \ref usbHsEpPostBufferAsync / \ref usbHsEpPostBuffer / \ref usbHsEpBatchBufferAsync. If the buffer address passed to those funcs is within this SmmuSpace, the specified buffer must be within the bounds of the SmmuSpace buffer.
diff --git a/nx/source/services/usbhs.c b/nx/source/services/usbhs.c
index a5d59655..a869ab4f 100644
--- a/nx/source/services/usbhs.c
+++ b/nx/source/services/usbhs.c
@@ -401,7 +401,7 @@ static Result _usbHsEpSubmitRequest(UsbHsClientEpSession* s, void* buffer, u32 s
     return rc;
 }
 
-Result usbHsEpPostBufferAsync(UsbHsClientEpSession* s, void* buffer, u32 size, u32* xferId) {
+Result usbHsEpPostBufferAsync(UsbHsClientEpSession* s, void* buffer, u32 size, u64 id, u32* xferId) {
     if (hosversionBefore(2,0,0))
         return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
 
@@ -409,8 +409,8 @@ Result usbHsEpPostBufferAsync(UsbHsClientEpSession* s, void* buffer, u32 size, u
         u32 size;
         u32 pad;
         u64 buffer;
-        u64 unk;
-    } in = { size, 0, (u64)buffer, 0 };
+        u64 id;
+    } in = { size, 0, (u64)buffer, id };
 
     serviceAssumeDomain(&s->s);
     return serviceDispatchInOut(&s->s, 4, in, *xferId);
@@ -462,7 +462,7 @@ Result usbHsEpPostBuffer(UsbHsClientEpSession* s, void* buffer, u32 size, u32* t
 
     if (hosversionBefore(2,0,0)) return _usbHsEpSubmitRequest(s, buffer, size, 0, transferredSize);
 
-    rc = usbHsEpPostBufferAsync(s, buffer, size, &xferId);
+    rc = usbHsEpPostBufferAsync(s, buffer, size, 0, &xferId);
     if (R_FAILED(rc)) return rc;
 
     rc = eventWait(&s->eventXfer, UINT64_MAX);
@@ -481,7 +481,7 @@ Result usbHsEpPostBuffer(UsbHsClientEpSession* s, void* buffer, u32 size, u32* t
     return rc;
 }
 
-Result usbHsEpBatchBufferAsync(UsbHsClientEpSession* s, void* buffer, u32* urbs, u32 urbCount, u32 unk1, u32 unk2, u32* xferId) {
+Result usbHsEpBatchBufferAsync(UsbHsClientEpSession* s, void* buffer, u32* urbs, u32 urbCount, u64 id, u32 unk1, u32 unk2, u32* xferId) {
     if (hosversionBefore(2,0,0))
         return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
 
@@ -491,8 +491,8 @@ Result usbHsEpBatchBufferAsync(UsbHsClientEpSession* s, void* buffer, u32* urbs,
         u32 unk2;
         u32 pad;
         u64 buffer;
-        u64 unk;
-    } in = { urbCount, unk1, unk2, 0, (u64)buffer, 0 };
+        u64 id;
+    } in = { urbCount, unk1, unk2, 0, (u64)buffer, id };
 
     serviceAssumeDomain(&s->s);
     return serviceDispatchInOut(&s->s, 6, in, *xferId,