diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 9fb98bc1ef..122b4419ff 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -57,6 +57,8 @@ typedef struct MemTxAttrs {
     unsigned int target_tlb_bit0 : 1;
     unsigned int target_tlb_bit1 : 1;
     unsigned int target_tlb_bit2 : 1;
+    /* Memory access request from the debugger */
+    unsigned int debug:1;
 } MemTxAttrs;
 
 /* Bus masters which don't specify any attributes will get this,