1 files changed, 2 insertions, 0 deletions
diff --git a/libcpp/init.c b/libcpp/init.c
index 65cca9b2bab..d1cc1e65d0f 100644
--- a/libcpp/init.c
+++ b/libcpp/init.c
@@ -611,6 +611,8 @@ post_options (cpp_reader *pfile)
 
   if (CPP_OPTION (pfile, traditional))
     {
+      CPP_OPTION (pfile, cplusplus_comments) = 0;
+
       /* Traditional CPP does not accurately track column information.  */
       CPP_OPTION (pfile, show_column) = 0;
       CPP_OPTION (pfile, trigraphs) = 0;