Index: uspace/lib/usb/src/addrkeep.c
===================================================================
--- uspace/lib/usb/src/addrkeep.c	(revision a822cd8dc4420329a5aaefd77bc0329a11e05e15)
+++ uspace/lib/usb/src/addrkeep.c	(revision 9223dc5c58b56b31aed872ef44cce3626c8181c9)
@@ -199,5 +199,5 @@
 			usb_address_keeping_used_t *last
 			    = used_address_get_instance(addresses->used_addresses.next);
-			free_address = last->address;
+			free_address = last->address + 1;
 		}
 	}