diff --git a/drm/ResourceManager.cpp b/drm/ResourceManager.cpp
index f64cae4..dd26c17 100644
--- a/drm/ResourceManager.cpp
+++ b/drm/ResourceManager.cpp
@@ -82,7 +82,7 @@
   }
 
   uevent_listener_->RegisterHotplugHandler([this] {
-    const std::lock_guard<std::mutex> lock(GetMainLock());
+    const std::unique_lock lock(GetMainLock());
     UpdateFrontendDisplays();
   });