Index: kernel/generic/include/log.h
===================================================================
--- kernel/generic/include/log.h	(revision 82d515e917f3eeeff253e4aa30e493f5f632c950)
+++ kernel/generic/include/log.h	(revision a8c7a6db104b3034fcb48a209245b42dec31768b)
@@ -52,5 +52,5 @@
 
 extern sysarg_t sys_klog(sysarg_t, void *buf, size_t size,
-    sysarg_t level);
+    sysarg_t level, size_t *uspace_nread);
 
 #endif /* KERN_LOG_H_ */