1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.h b/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.h
index 7b14a899f..7c21de317 100644
--- a/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.h
+++ b/mrbgems/mruby-bin-debugger/tools/mrdb/mrdb.h
@@ -105,7 +105,7 @@ typedef struct mrb_debug_breakpoint {
 typedef struct mrb_debug_context {
   struct mrb_irep *root_irep;
   struct mrb_irep *irep;
-  mrb_code *pc;
+  const mrb_code *pc;
   mrb_value *regs;
 
   const char *prvfile;