diff --git a/gdbstub.c b/gdbstub.c
index 1517563abe..bfc7afb509 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1732,6 +1732,12 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
             if (cc->gdb_core_xml_file != NULL) {
                 pstrcat(buf, sizeof(buf), ";qXfer:features:read+");
             }
+
+            if (strstr(p, "multiprocess+")) {
+                s->multiprocess = true;
+            }
+            pstrcat(buf, sizeof(buf), ";multiprocess+");
+
             put_packet(s, buf);
             break;
         }