Index: uspace/lib/usb/include/usb/usb.h
===================================================================
--- uspace/lib/usb/include/usb/usb.h	(revision 47c573a101cf9466d15097f23de782fda58131fe)
+++ uspace/lib/usb/include/usb/usb.h	(revision 69b1f3dc9ee049d62dcc1a80ffae19ff14059580)
@@ -83,13 +83,4 @@
 } usb_request_recipient_t;
 
-/** USB transaction outcome. */
-typedef enum {
-	USB_OUTCOME_OK,
-	USB_OUTCOME_CRCERROR,
-	USB_OUTCOME_BABBLE
-} usb_transaction_outcome_t;
-
-const char * usb_str_transaction_outcome(usb_transaction_outcome_t o);
-
 /** USB address type.
  * Negative values could be used to indicate error.
Index: uspace/lib/usb/src/usb.c
===================================================================
--- uspace/lib/usb/src/usb.c	(revision 47c573a101cf9466d15097f23de782fda58131fe)
+++ uspace/lib/usb/src/usb.c	(revision 69b1f3dc9ee049d62dcc1a80ffae19ff14059580)
@@ -54,20 +54,4 @@
 }
 
-/** String representation of USB transaction outcome. */
-const char * usb_str_transaction_outcome(usb_transaction_outcome_t o)
-{
-	switch (o) {
-		case USB_OUTCOME_OK:
-			return "ok";
-		case USB_OUTCOME_CRCERROR:
-			return "CRC error";
-		case USB_OUTCOME_BABBLE:
-			return "babble";
-		default:
-			return "unknown";
-	}
-}
-
-
 /**
  * @}