diff --git a/src/mbgl/storage/default_file_source.cpp b/src/mbgl/storage/default_file_source.cpp
index 690a96881..cc7475d2f 100644
--- a/src/mbgl/storage/default_file_source.cpp
+++ b/src/mbgl/storage/default_file_source.cpp
@@ -85,7 +85,7 @@ void DefaultFileSource::Impl::add(Request* req) {
         return;
     }
 
-    request = &pending.emplace(resource, DefaultFileRequest(resource)).first->second;
+    request = &pending.emplace(resource, resource).first->second;
     request->observers.insert(req);
 
     if (cache) {
diff --git a/src/mbgl/storage/default_file_source_impl.hpp b/src/mbgl/storage/default_file_source_impl.hpp
index ed2d248d0..3845014e9 100644
--- a/src/mbgl/storage/default_file_source_impl.hpp
+++ b/src/mbgl/storage/default_file_source_impl.hpp
@@ -19,8 +19,14 @@ struct DefaultFileRequest {
     std::set<Request*> observers;
     RequestBase* request = nullptr;
 
-    DefaultFileRequest(const Resource& resource_)
+    inline DefaultFileRequest(const Resource& resource_)
         : resource(resource_) {}
+
+    // Make it movable-only
+    DefaultFileRequest(const DefaultFileRequest&) = delete;
+    inline DefaultFileRequest(DefaultFileRequest&&) = default;
+    DefaultFileRequest& operator=(const DefaultFileRequest&) = delete;
+    inline DefaultFileRequest& operator=(DefaultFileRequest&&) = default;
 };
 
 class DefaultFileSource::Impl {