diff --git a/src/include/assert.h b/src/include/assert.h
index 4575a29e44..e0db0bc05c 100644
--- a/src/include/assert.h
+++ b/src/include/assert.h
@@ -56,7 +56,8 @@
  * bootmode.c:42: undefined reference to `dead_code_assertion_failed_at_line_42'
  */
 #define __dead_code(line) do { \
-	extern void dead_code_assertion_failed_at_line_##line(void); \
+	extern void dead_code_assertion_failed_at_line_##line(void) \
+		__attribute__((noreturn)); \
 	dead_code_assertion_failed_at_line_##line(); \
 } while (0)
 #define _dead_code(line) __dead_code(line)