diff --git a/bootloader/main-pp.c b/bootloader/main-pp.c
index c2d0b8038d..3cf7691870 100644
--- a/bootloader/main-pp.c
+++ b/bootloader/main-pp.c
@@ -40,7 +40,7 @@
 #endif
 #if defined(SANSA_E200) || defined(SANSA_C200)
 #include "usb.h"
-#include "arcotg_udc.h"
+#include "usb_drv.h"
 #endif
 
 
@@ -460,7 +460,7 @@ void* main(void)
     btn = button_read_device();
 #if defined(SANSA_E200) || defined(SANSA_C200)
     usb_init();
-    while ((UDC_OTGSC&0x800) && usb_retry < 5 && !usb)
+    while (usb_drv_powered() && usb_retry < 5 && !usb)
     {
         usb_retry++;
         sleep(HZ/4);
diff --git a/firmware/export/usb_drv.h b/firmware/export/usb_drv.h
index a30f2ec494..264b5d18f8 100644
--- a/firmware/export/usb_drv.h
+++ b/firmware/export/usb_drv.h
@@ -31,5 +31,6 @@ void usb_drv_ack(struct usb_ctrlrequest* req);
 void usb_drv_set_address(int address);
 void usb_drv_reset_endpoint(int endpoint, bool send);
 void usb_drv_wait(int endpoint, bool send);
+bool usb_drv_powered(void);
 
 #endif
diff --git a/firmware/target/arm/usb-drv-pp502x.c b/firmware/target/arm/usb-drv-pp502x.c
index a837728a4e..c77b881833 100644
--- a/firmware/target/arm/usb-drv-pp502x.c
+++ b/firmware/target/arm/usb-drv-pp502x.c
@@ -247,6 +247,9 @@
 #define USB_CTRL_IOENB                         (0x00000004)
 #define USB_CTRL_ULPI_INT0EN                   (0x00000001)
 
+/* OTGSC Register Bit Masks */
+#define OTGSC_B_SESSION_VALID                  (0x00000800)
+
 #define QH_MULT_POS                            (30)
 #define QH_ZLT_SEL                             (0x20000000)
 #define QH_MAX_PKT_LEN_POS                     (16)
@@ -322,6 +325,10 @@ static void init_queue_heads(void);
 static void init_endpoints(void);
 /*-------------------------------------------------------------------------*/
 
+bool usb_drv_powered(void)
+{
+    return (REG_OTGSC & OTGSC_B_SESSION_VALID) ? true : false;
+}
 
 /* manual: 32.14.1 Device Controller Initialization */
 void usb_drv_init(void)