Index: uspace/lib/libc/generic/udebug.c
===================================================================
--- uspace/lib/libc/generic/udebug.c	(revision 47e0a05baa886b025c008b7e51748be0a29cd784)
+++ uspace/lib/libc/generic/udebug.c	(revision 7dc62afbea468dbb599d204c3ca42380aa64a2ae)
@@ -58,8 +58,6 @@
 	size_t *copied, size_t *needed)
 {
-	unsigned dest_addr;
-
 	return async_req_3_3(phoneid, IPC_M_DEBUG_ALL, UDEBUG_M_THREAD_READ,
-		(sysarg_t)buffer, n, &dest_addr, copied, needed);
+		(sysarg_t)buffer, n, NULL, copied, needed);
 }