diff --git a/module_usb_audio/endpoint0/descriptors.h b/module_usb_audio/endpoint0/descriptors.h
index f054dc52..c613f1a5 100644
--- a/module_usb_audio/endpoint0/descriptors.h
+++ b/module_usb_audio/endpoint0/descriptors.h
@@ -1119,6 +1119,9 @@ typedef struct
 #endif
     USB_Descriptor_Audio_OutputTerminal_t       Audio_In_OutputTerminal;
 #endif
+#if defined (SPDIF_RX) || defined (ADAT_RX)
+    USB_Descriptor_Endpoint_t                   Audio_Int_Endpoint;
+#endif
 } __attribute__((packed)) USB_CfgDesc_Audio2_CS_Control_Int;
 
 typedef struct
@@ -1576,6 +1579,19 @@ USB_Config_Descriptor_Audio2_t cfgDesc_Audio2=
             .iTerminal                 = offsetof(StringDescTable_t, usbOutputTermStr_Audio2)/sizeof(char *)
         },
 #endif
+
+#if defined(SPDIF_RX) || defined(ADAT_RX)
+        /* Standard AS Interrupt Endpoint Descriptor (4.8.2.1): */ 
+        .Audio_Int_Endpoint =
+        {
+            .bLength                        = sizeof(USB_Descriptor_Endpoint_t),
+            .bDescriptorType                = USB_DESCTYPE_ENDPOINT,
+            .bEndpointAddress               = ENDPOINT_ADDRESS_IN_INTERRUPT,     /* (D7: 0:out, 1:in) */
+            .bmAttributes                   = 0x03,     /* (bitmap)  */
+            .wMaxPacketSize                 = 6,
+            .bInterval                      = 8,
+        },
+#endif
     }, /* End of .Audio_CS_Control_Int */
 
 #if (NUM_USB_CHAN_OUT > 0)