Index: uspace/lib/c/include/assert.h
===================================================================
--- uspace/lib/c/include/assert.h	(revision e06e27166f1b30422fc5f34049108ea34cdd2cfb)
+++ uspace/lib/c/include/assert.h	(revision f66b565b8b2a1484baa2cb20482e3e642c37a723)
@@ -64,5 +64,4 @@
     __attribute__((noreturn));
 
-
 #endif
 
Index: uspace/lib/c/include/io/klog.h
===================================================================
--- uspace/lib/c/include/io/klog.h	(revision e06e27166f1b30422fc5f34049108ea34cdd2cfb)
+++ uspace/lib/c/include/io/klog.h	(revision f66b565b8b2a1484baa2cb20482e3e642c37a723)
@@ -37,7 +37,10 @@
 
 #include <sys/types.h>
+#include <stdarg.h>
 
 extern size_t klog_write(const void *, size_t);
 extern void klog_update(void);
+extern int klog_printf(const char *, ...);
+extern int klog_vprintf(const char *, va_list);
 
 #endif