diff --git a/scripts/west_commands/sign.py b/scripts/west_commands/sign.py
index 54006e565c741db..80783bce900be01 100644
--- a/scripts/west_commands/sign.py
+++ b/scripts/west_commands/sign.py
@@ -444,6 +444,12 @@ def preprocess_toml(self, config_dir, toml_basename, subdir):
         # unfortunately don't seem to make any difference here and they're
         # gcc-specific)
         preproc_cmd += ['-P']
+        # REM allows standalone comments to be preserved in generated/*.toml.
+        # A "double" `REM # my comment...` is not necessary but recommended for
+        # syntax highlighting.
+        # Note trailing comments are ignored by cpp and don't need any REM
+        # trick, a trailing `#` is enough.
+        preproc_cmd += ['-DREM=#']
         preproc_cmd += ['-I', str(self.sof_src_dir / 'src')]
         preproc_cmd += ['-imacros',
                         str(pathlib.Path('zephyr') / 'include' / 'generated' / 'autoconf.h')]