1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/components/glean/bindings/private/Labeled.cpp b/toolkit/components/glean/bindings/private/Labeled.cpp
index 23527708e0..1af9b870ae 100644
--- a/toolkit/components/glean/bindings/private/Labeled.cpp
+++ b/toolkit/components/glean/bindings/private/Labeled.cpp
@@ -31,7 +31,7 @@ already_AddRefed<GleanMetric> GleanLabeled::NamedGetter(const nsAString& aName,
 
   auto mirrorId = ScalarIdForMetric(mId);
   if (mirrorId) {
-    GetLabeledMirrorLock().apply([&](auto& lock) {
+    GetLabeledMirrorLock().apply([&](const auto& lock) {
       auto tuple = std::make_tuple<Telemetry::ScalarID, nsString>(
           mirrorId.extract(), nsString(aName));
       lock.ref()->InsertOrUpdate(submetricId, std::move(tuple));