diff --git a/flex/bin/cypher_client.cc b/flex/bin/cypher_client.cc
index 4b0e66e3af23..20a168305b0e 100644
--- a/flex/bin/cypher_client.cc
+++ b/flex/bin/cypher_client.cc
@@ -62,7 +62,7 @@ int main(int argc, char** argv) {
     if (query == "") {
       continue;
     }
-    query.append(1, 246);
+    query.append(1, '\xF6');
     query.append(1, 4);
     auto res = cli.Post("/v1/graph/current/query", query, "text/plain");
     std::string ret = res->body;