diff --git a/arch/arm/src/lpc17xx/lpc17_usb.h b/arch/arm/src/lpc17xx/lpc17_usb.h
index f9d9752e57..ec23315048 100755
--- a/arch/arm/src/lpc17xx/lpc17_usb.h
+++ b/arch/arm/src/lpc17xx/lpc17_usb.h
@@ -679,6 +679,28 @@
 
 #define CMD_USBDEV_CLRBUFFER_PO          (0x00000001)
 
+/* SETMODE(0xf3) command */
+
+#define CMD_SETMODE_APCLK                (1 << 0)  /* Bit 0:  Always PLL Clock */
+#define CMD_SETMODE_INAKCI               (1 << 1)  /* Bit 1:  Interrupt on NAK for Control IN endpoint */
+#define CMD_SETMODE_INAKCO               (1 << 2)  /* Bit 2:  Interrupt on NAK for Control OUT endpoint */
+#define CMD_SETMODE_INAKII               (1 << 3)  /* Bit 3:  Interrupt on NAK for Interrupt IN endpoint */
+#define CMD_SETMODE_INAKIO               (1 << 4)  /* Bit 4:  Interrupt on NAK for Interrupt OUT endpoints */
+#define CMD_SETMODE_INAKBI               (1 << 5)  /* Bit 5:  Interrupt on NAK for Bulk IN endpoints */
+#define CMD_SETMODE_INAKBO               (1 << 6)  /* Bit 6:  Interrupt on NAK for Bulk OUT endpoints */
+
+/* READERRORSTATUS (0xFb) command */
+
+#define CMD_READERRORSTATUS_PIDERR       (1 << 0) /* Bit 0: PID encoding/unknown or Token CRC */
+#define CMD_READERRORSTATUS_UEPKT        (1 << 1) /* Bit 1: Unexpected Packet */
+#define CMD_READERRORSTATUS_DCRC         (1 << 2) /* Bit 2: Data CRC error */
+#define CMD_READERRORSTATUS_TIMEOUT      (1 << 3) /* Bit 3: Time out error */
+#define CMD_READERRORSTATUS_EOP          (1 << 4) /* Bit 4: End of packet error */
+#define CMD_READERRORSTATUS_BOVRN        (1 << 5) /* Bit 5: Buffer Overrun */
+#define CMD_READERRORSTATUS_BTSTF        (1 << 6) /* Bit 6: Bit stuff error */
+#define CMD_READERRORSTATUS_TGLERR       (1 << 7) /* Bit 7: Wrong toggle in data PID */
+#define CMD_READERRORSTATUS_ALLERRS      (0xff)
+
 /* DMA ******************************************************************************/
 /* The DMA descriptor */
 
diff --git a/arch/arm/src/lpc17xx/lpc17_usbdev.c b/arch/arm/src/lpc17xx/lpc17_usbdev.c
index c5389813a3..7faa7bd3cc 100755
--- a/arch/arm/src/lpc17xx/lpc17_usbdev.c
+++ b/arch/arm/src/lpc17xx/lpc17_usbdev.c
@@ -2080,7 +2080,7 @@ static int lpc17_usbinterrupt(int irq, FAR void *context)
 
           /* And show what error occurred */
 
-          errcode  = (uint8_t)lpc17_usbcmd(CMD_USBDEV_READERRORSTATUS, 0) & 0x0f;
+          errcode  = (uint8_t)lpc17_usbcmd(CMD_USBDEV_READERRORSTATUS, 0) & CMD_READERRORSTATUS_ALLERRS;
           usbtrace(TRACE_INTDECODE(LPC17_TRACEINTID_ERRINT), (uint16_t)errcode);
         }
 #endif
@@ -3245,6 +3245,10 @@ void up_usbinitialize(void)
   lpc17_putreg(0xffffffff, LPC17_USBDEV_EPINTCLR);
   lpc17_putreg(0, LPC17_USBDEV_EPINTPRI);
 
+  /* Interrupt only on ACKs */
+
+  lpc17_usbcmd(CMD_USBDEV_SETMODE, 0);
+
   /* Attach USB controller interrupt handler */
 
   if (irq_attach(LPC17_IRQ_USB, lpc17_usbinterrupt) != 0)