diff --git a/wifi/1.0/default/wifi_legacy_hal.cpp b/wifi/1.0/default/wifi_legacy_hal.cpp
index a16c58f509..b6a7550b39 100644
--- a/wifi/1.0/default/wifi_legacy_hal.cpp
+++ b/wifi/1.0/default/wifi_legacy_hal.cpp
@@ -164,6 +164,7 @@ void onAsyncRttResults(wifi_request_id id,
   const auto lock = hidl_sync_util::acquireGlobalLock();
   if (on_rtt_results_internal_callback) {
     on_rtt_results_internal_callback(id, num_results, rtt_results);
+    on_rtt_results_internal_callback = nullptr;
   }
 }