diff --git a/bochs/bx_debug/parser.cc b/bochs/bx_debug/parser.cc
index 481bcc263..6031beef5 100644
--- a/bochs/bx_debug/parser.cc
+++ b/bochs/bx_debug/parser.cc
@@ -355,7 +355,7 @@ union YYSTYPE
 
   char    *sval;
   Bit64u   uval;
-  bx_bool  bval;
+  unsigned bval;
 
 #line 361 "y.tab.c" /* yacc.c:355  */
 };