diff --git a/include/stdlib.h b/include/stdlib.h
index a5fe2ad..d8b9f8f 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -10,7 +10,7 @@
 
 int atexit(void (*function)(void));
 void exit(int status);
-void abort(void);
+_Noreturn void abort(void);
 
 void *calloc(size_t num, size_t sz);
 void *malloc(size_t sz);
diff --git a/sys/include/kassert.h b/sys/include/kassert.h
index b34d9a2..894a9d9 100644
--- a/sys/include/kassert.h
+++ b/sys/include/kassert.h
@@ -20,7 +20,7 @@
 NO_RETURN void Panic(const char *str);
 
 int kprintf(const char *fmt, ...);
-void Debug_Assert(const char *fmt, ...);
+NO_RETURN void Debug_Assert(const char *fmt, ...);
 
 #define static_assert _Static_assert