diff --git a/test/CFrontend/2007-06-18-SextAttrAggregate.c b/test/CFrontend/2007-06-18-SextAttrAggregate.c
index 2eabd4fcca4..2fcd72607a2 100644
--- a/test/CFrontend/2007-06-18-SextAttrAggregate.c
+++ b/test/CFrontend/2007-06-18-SextAttrAggregate.c
@@ -6,6 +6,6 @@ long a;
 long b;
 };
 
-void f(struct s a, char *b, char C) {
+void f(struct s a, char *b, signed char C) {
 
 }