diff --git a/scripts/maint/annotate_ifdef_directives b/scripts/maint/annotate_ifdef_directives
index 2571bc9a2..368d842e2 100755
--- a/scripts/maint/annotate_ifdef_directives
+++ b/scripts/maint/annotate_ifdef_directives
@@ -47,7 +47,7 @@ def translate(f_in, f_out):
                 raise Problem("Unexpected #%s on %d"% (command,lineno))
             if (len(cur_level) == 1 and command == 'else' and
                 lineno > cur_level[0][2] + LINE_OBVIOUSNESS_LIMIT):
-                f_out.write("#else // !(%s)\n"%cur_level[0][1])
+                f_out.write("#else /* !(%s) */\n"%cur_level[0][1])
             else:
                 f_out.write(line)
             cur_level.append((command, rest, lineno))
@@ -59,9 +59,9 @@ def translate(f_in, f_out):
                 f_out.write(line)
             elif len(cur_level) == 1 or (
                     len(cur_level) == 2 and cur_level[1][0] == 'else'):
-                f_out.write("#endif // %s\n"%cur_level[0][1])
+                f_out.write("#endif /* %s */\n"%cur_level[0][1])
             else:
-                f_out.write("#endif // %s || ...\n"%cur_level[0][1])
+                f_out.write("#endif /* %s || ... */\n"%cur_level[0][1])
             cur_level = stack.pop()
     if len(stack) or cur_level != whole_file:
         raise Problem("Missing #endif")