diff --git a/src/arch/x86/remote_gdb.hh b/src/arch/x86/remote_gdb.hh
index a5e26cc2d..e21250875 100644
--- a/src/arch/x86/remote_gdb.hh
+++ b/src/arch/x86/remote_gdb.hh
@@ -71,6 +71,7 @@ namespace X86ISA
       protected:
         enum RegisterContants
         {
+            NumGDBRegs
             //XXX fill this in
         };