Index: firmware/target/arm/as3525/usb-as3525.c
===================================================================
--- firmware/target/arm/as3525/usb-as3525.c	(revision 26638)
+++ firmware/target/arm/as3525/usb-as3525.c	(working copy)
@@ -29,6 +29,10 @@
 #include "power.h"
 #include "as3525.h"
 
+#if defined(SANSA_E200V2) || defined(SANSA_FUZE)
+#include "dbop-as3525.h"
+#endif
+
 static int usb_status = USB_EXTRACTED;
 
 void usb_enable(bool on)
@@ -45,7 +49,12 @@
 
 void usb_insert_int(void)
 {
-    usb_status = USB_INSERTED;
+#if defined(SANSA_E200V2) || defined(SANSA_FUZE)
+    unsigned dbop_din = dbop_read_input();
+    /* If dock is connected (dbop_din bit 9) do not switch to usb mode */
+    if ((dbop_din & (1 << 9)) == 0)
+#endif
+        usb_status = USB_INSERTED;
 }
 
 void usb_remove_int(void)