diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index 25a9666be5..8ef6fd60c3 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -193,6 +193,7 @@ class Board:
             '-Werror=type-limits',
             '-Werror=unused-result',
             '-Werror=shadow',
+            '-Werror=unused-value',
             '-Werror=unused-variable',
             '-Werror=delete-non-virtual-dtor',
             '-Wfatal-errors',