diff --git a/Core/gb.h b/Core/gb.h
index 7600606..bd8d0eb 100644
--- a/Core/gb.h
+++ b/Core/gb.h
@@ -379,7 +379,7 @@ typedef struct GB_gameboy_s {
     size_t ir_queue_length;
 
     /*** Debugger ***/
-    bool debug_stopped;
+    volatile bool debug_stopped;
     bool debug_fin_command, debug_next_command;
 
     /* Breakpoints */