diff --git a/extensions/vd/controller.cpp b/extensions/vd/controller.cpp
index 4d2d3d360f..cc644d2225 100644
--- a/extensions/vd/controller.cpp
+++ b/extensions/vd/controller.cpp
@@ -83,8 +83,8 @@ namespace ace {
             }
 
             { 
-                std::lock_guard<std::mutex> lock(_results_lock);
-                std::lock_guard<std::mutex> lock(_messages_lock);
+                std::lock_guard<std::mutex> lock_results(_results_lock);
+                std::lock_guard<std::mutex> lock_messages(_messages_lock);
 
                 while (!_results.empty()) {
                     _results.pop();