diff --git a/lib/bundler/source/rubygems.rb b/lib/bundler/source/rubygems.rb
index 15bd8dacbb..7a80ec2b00 100644
--- a/lib/bundler/source/rubygems.rb
+++ b/lib/bundler/source/rubygems.rb
@@ -275,7 +275,9 @@ module Bundler
 
         Bundler.ui.debug "Double checking for #{unmet_dependency_names || "all specs (due to the size of the request)"} in #{self}"
 
-        fetch_names(api_fetchers, unmet_dependency_names, specs, false)
+        fetch_names(api_fetchers, unmet_dependency_names, remote_specs, false)
+
+        specs.use(remote_specs, false)
       end
 
       def dependency_names_to_double_check
diff --git a/spec/bundler/install/gemfile/sources_spec.rb b/spec/bundler/install/gemfile/sources_spec.rb
index 1f89f9f0f9..8cb0476821 100644
--- a/spec/bundler/install/gemfile/sources_spec.rb
+++ b/spec/bundler/install/gemfile/sources_spec.rb
@@ -78,6 +78,33 @@ RSpec.describe "bundle install with gems on multiple sources" do
     end
   end
 
+  context "without source affinity, and a stdlib gem present in one of the sources", :ruby_repo do
+    let(:default_json_version) { ruby "gem 'json'; require 'json'; puts JSON::VERSION" }
+
+    before do
+      build_repo2 do
+        build_gem "json", default_json_version
+      end
+
+      build_repo4 do
+        build_gem "foo" do |s|
+          s.add_dependency "json", default_json_version
+        end
+      end
+
+      gemfile <<-G
+        source "https://gem.repo2"
+        source "https://gem.repo4"
+
+        gem "foo"
+      G
+    end
+
+    it "works in standalone mode", :bundler => "< 3" do
+      bundle "install --standalone", :artifice => "compact_index"
+    end
+  end
+
   context "with source affinity" do
     context "with sources given by a block" do
       before do