diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index fa9c0eb5b8..51c28d0d23 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -103,7 +103,6 @@ class Board:
             env.CFLAGS += [
                 '-g',
                 '-O0',
-                '-Wno-trigraphs',
             ]
 
         env.CXXFLAGS += [