diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index 79e47a024e..75eb4d9c36 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -6,6 +6,7 @@ typedef struct GDBFeature {
     const char *xml;
     const char *name;
     const char * const *regs;
+    int base_reg;
     int num_regs;
 } GDBFeature;
 
diff --git a/scripts/feature_to_c.py b/scripts/feature_to_c.py
index 1329695ad0..a52cd2e9ec 100644
--- a/scripts/feature_to_c.py
+++ b/scripts/feature_to_c.py
@@ -102,6 +102,7 @@ def writeliteral(indent, bytes):
         sys.stdout.write(',\n')
 
     sys.stdout.write( '        },\n')
+    sys.stdout.write(f'        .base_reg = {base_reg},\n')
     sys.stdout.write(f'        .num_regs = {num_regs},\n')
     sys.stdout.write( '    },\n')