1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/c-parse.in b/gcc/c-parse.in
index 3e131cc..74bef88 100644
--- a/gcc/c-parse.in
+++ b/gcc/c-parse.in
@@ -413,7 +413,7 @@ unop:     '&'
 	| '+'
 		{ $$ = CONVERT_EXPR;
 ifc
-  if (warn_traditional)
+  if (warn_traditional && !in_system_header)
     warning ("traditional C rejects the unary plus operator");
 end ifc
 		}