Index: uspace/lib/c/include/ipc/dev_iface.h
===================================================================
--- uspace/lib/c/include/ipc/dev_iface.h	(revision 059a8e4b4f97d287fdb888636dac0f59bfafa019)
+++ uspace/lib/c/include/ipc/dev_iface.h	(revision 28ca043f03a30a495ef7a410a939236ea59874bf)
@@ -52,4 +52,7 @@
 	USBHID_DEV_IFACE,
 
+	/** Interface provided by Real Time Clock devices */
+	CLOCK_DEV_IFACE,
+
 	DEV_IFACE_MAX
 } dev_inferface_idx_t;