Index: uspace/lib/usb/include/usb/classes/classes.h
===================================================================
--- uspace/lib/usb/include/usb/classes/classes.h	(revision fa9b606e0a4d7d2b81ec316d32d2e9c5ba285fc1)
+++ uspace/lib/usb/include/usb/classes/classes.h	(revision 14388b462f38e091bedab5aee1fbfd96af8f3a3d)
@@ -60,4 +60,5 @@
 } usb_class_t;
 
+const char *usb_str_class(usb_class_t);
 
 #endif