Nucleus

diff --git a/include/nucleus/kernel.h b/include/nucleus/kernel.h
index 50bba3d..2b1bc75 100644
--- a/include/nucleus/kernel.h
+++ b/include/nucleus/kernel.h
@@ -2,9 +2,8 @@
 #define _NUCLEUS_KERNEL_H
 
 #include <stdarg.h>
+#include <nucleus/lib.h>
 
-int vsprintf(char *buf, const char *fmt, va_list args);
-int sprintf(char *buf, const char *fmt, ...);
 void dbgprintf(char *str);
 void kprintf(char *fmt, ...);
 _Noreturn void panic(char *fmt, ...);