diff --git a/core/usbd_core.c b/core/usbd_core.c
index 2fdf94a8..1fd0655e 100644
--- a/core/usbd_core.c
+++ b/core/usbd_core.c
@@ -20,6 +20,7 @@
 
 struct usbd_tx_rx_msg {
     uint8_t ep;
+    uint8_t ep_mult;
     uint16_t ep_mps;
     uint32_t nbytes;
     usbd_endpoint_callback cb;
@@ -103,9 +104,11 @@ static bool usbd_set_endpoint(uint8_t busid, const struct usb_endpoint_descripto
                  USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize));
 
     if (ep->bEndpointAddress & 0x80) {
-        g_usbd_core[busid].tx_msg[ep->bEndpointAddress & 0x7f].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize) * (USB_GET_MULT(ep->wMaxPacketSize));
+        g_usbd_core[busid].tx_msg[ep->bEndpointAddress & 0x7f].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize);
+        g_usbd_core[busid].tx_msg[ep->bEndpointAddress & 0x7f].ep_mult = USB_GET_MULT(ep->wMaxPacketSize);
     } else {
-        g_usbd_core[busid].rx_msg[ep->bEndpointAddress & 0x7f].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize) * (USB_GET_MULT(ep->wMaxPacketSize));
+        g_usbd_core[busid].rx_msg[ep->bEndpointAddress & 0x7f].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize);
+        g_usbd_core[busid].rx_msg[ep->bEndpointAddress & 0x7f].ep_mult = USB_GET_MULT(ep->wMaxPacketSize);
     }
 
     return usbd_ep_open(busid, ep) == 0 ? true : false;
@@ -1213,6 +1216,15 @@ uint16_t usbd_get_ep_mps(uint8_t busid, uint8_t ep)
     }
 }
 
+uint8_t usbd_get_ep_mult(uint8_t busid, uint8_t ep)
+{
+    if (ep & 0x80) {
+        return g_usbd_core[busid].tx_msg[ep & 0x7f].ep_mult;
+    } else {
+        return g_usbd_core[busid].rx_msg[ep & 0x7f].ep_mult;
+    }
+}
+
 bool usb_device_is_configured(uint8_t busid)
 {
     return g_usbd_core[busid].configuration;
diff --git a/core/usbd_core.h b/core/usbd_core.h
index a4155058..f825b41b 100644
--- a/core/usbd_core.h
+++ b/core/usbd_core.h
@@ -98,7 +98,9 @@ void usbd_add_interface(uint8_t busid, struct usbd_interface *intf);
 void usbd_add_endpoint(uint8_t busid, struct usbd_endpoint *ep);
 
 uint16_t usbd_get_ep_mps(uint8_t busid, uint8_t ep);
+uint8_t usbd_get_ep_mult(uint8_t busid, uint8_t ep);
 bool usb_device_is_configured(uint8_t busid);
+
 int usbd_initialize(uint8_t busid, uint32_t reg_base, void (*event_handler)(uint8_t busid, uint8_t event));
 int usbd_deinitialize(uint8_t busid);