diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index 89b1a964972b8..b3382ee88370c 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -1390,6 +1390,7 @@ def configure_env(self, cfg, env):
         ]
 
         # wrap malloc to ensure memory is zeroed
+        # note that this also needs to be done in the CMakeLists.txt files
         env.LINKFLAGS += ['-Wl,--wrap,malloc']
 
         if cfg.options.force_32bit: