Index: uspace/lib/c/include/io/klog.h
===================================================================
--- uspace/lib/c/include/io/klog.h	(revision c821184900f17ef522a28aef06369f66ec1d6e4c)
+++ uspace/lib/c/include/io/klog.h	(revision a8c7a6db104b3034fcb48a209245b42dec31768b)
@@ -44,6 +44,6 @@
 #include <abi/log.h>
 
-extern size_t klog_write(log_level_t, const void *, size_t);
-extern int klog_read(void *, size_t);
+extern int klog_write(log_level_t, const void *, size_t);
+extern int klog_read(void *, size_t, size_t *);
 
 #define KLOG_PRINTF(lvl, fmt, ...) ({ \