--- a/gfx/thebes/DeviceManagerDx.cpp
+++ b/gfx/thebes/DeviceManagerDx.cpp
@@ -684,17 +684,17 @@ DisableAdvancedLayers(FeatureStatus aSta
   if (!al.IsEnabled()) {
     return;
   }
 
   al.SetFailed(aStatus, aMessage.get(), aFailureId);
 
   FeatureFailure info(aStatus, aMessage, aFailureId);
   if (GPUParent* gpu = GPUParent::GetSingleton()) {
-    gpu->SendUpdateFeature(Feature::ADVANCED_LAYERS, info);
+    Unused << gpu->SendUpdateFeature(Feature::ADVANCED_LAYERS, info);
   }
 
   if (aFailureId.Length()) {
     nsString failureId = NS_ConvertUTF8toUTF16(aFailureId.get());
     Telemetry::ScalarAdd(Telemetry::ScalarID::GFX_ADVANCED_LAYERS_FAILURE_ID, failureId, 1);
   }
 
   // Notify TelemetryEnvironment.jsm.