diff --git a/lib_xua/api/xua_conf_default.h b/lib_xua/api/xua_conf_default.h
index 9bfa7bbd..490647cc 100644
--- a/lib_xua/api/xua_conf_default.h
+++ b/lib_xua/api/xua_conf_default.h
@@ -1445,6 +1445,12 @@ enum USBEndpointNumber_Out
 #error Bad DEFAULT_MCLK_FREQ
 #endif
 
+/* DFU functional descriptor wDetachTimeOut field (milliseconds)
+ * Time for device to wait for bus reset after DETACH request before reverting to idle state */
+#ifndef DFU_DETACH_TIME_OUT
+#define DFU_DETACH_TIME_OUT 250
+#endif
+
 #if ((MCLK_441 % MIN_FREQ) == 0)
 #define MIN_FREQ_44 MIN_FREQ
 #define MIN_FREQ_48 ((48000 * 512)/((44100 * 512)/MIN_FREQ))
@@ -1466,4 +1472,3 @@ enum USBEndpointNumber_Out
 #if (CODEC_MASTER == 1) && (DSD_CHANS_DAC != 0) 
 #error CODEC_MASTER with DSD is currently unsupported 
 #endif
-
diff --git a/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h b/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h
index 1461fc16..76245fac 100644
--- a/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h
+++ b/lib_xua/src/core/endpoint0/xua_ep0_descriptors.h
@@ -2068,8 +2068,8 @@ USB_Config_Descriptor_Audio2_t cfgDesc_Audio2=
     0x09,                                 /* 0    Size */
     0x21,                                 /* 1    bDescriptorType : DFU FUNCTIONAL */
     0x07,                                 /* 2    bmAttributes */
-    0xFA,                                 /* 3    wDetachTimeOut */
-    0x00,                                 /* 4    wDetachTimeOut */
+    DFU_DETACH_TIME_OUT & 0xFF,           /* 3    wDetachTimeOut */
+    (DFU_DETACH_TIME_OUT >> 8) & 0xFF,    /* 4    wDetachTimeOut */
     0x40,                                 /* 5    wTransferSize */
     0x00,                                 /* 6    wTransferSize */
     0x10,                                 /* 7    bcdDFUVersion */
@@ -2849,8 +2849,8 @@ unsigned char cfgDesc_Audio1[] =
     0x09,                                 /* 0    Size */
     0x21,                                 /* 1    bDescriptorType : DFU FUNCTIONAL */
     0x07,                                 /* 2    bmAttributes */
-    0xFA,                                 /* 3    wDetachTimeOut */
-    0x00,                                 /* 4    wDetachTimeOut */
+    DFU_DETACH_TIME_OUT & 0xFF,           /* 3    wDetachTimeOut */
+    (DFU_DETACH_TIME_OUT >> 8) & 0xFF,    /* 4    wDetachTimeOut */
     0x40,                                 /* 5    wTransferSize */
     0x00,                                 /* 6    wTransferSize */
     0x10,                                 /* 7    bcdDFUVersion */