Index: gcc/treelang/treetree.c
===================================================================
--- gcc/treelang/treetree.c	(revision 106713)
+++ gcc/treelang/treetree.c	(working copy)
@@ -62,7 +62,6 @@
 #include "tree-iterator.h"
 #include "tree-gimple.h"
 #include "function.h"
-#include "flags.h"
 #include "output.h"
 #include "ggc.h"
 #include "toplev.h"
@@ -1141,7 +1140,7 @@
   pushlevel (0);	/* make the binding_level structure for global names */
   global_binding_level = current_binding_level;
 
-  build_common_tree_nodes (flag_signed_char, false);
+  build_common_tree_nodes (true, false);
 
   /* set standard type names */