diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 3bb849d98f..61add4be10 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -626,7 +626,7 @@ module Bundler
         last_resolve = converge_locked_specs
         remove_invalid_platforms!
         packages = Resolver::Base.new(source_requirements, expanded_dependencies, last_resolve, @platforms, locked_specs: @originally_locked_specs, unlock: @unlocking_all || @gems_to_unlock, prerelease: gem_version_promoter.pre?, prefer_local: @prefer_local, new_platforms: @new_platforms)
-        packages = additional_base_requirements_to_prevent_downgrades(packages, last_resolve)
+        packages = additional_base_requirements_to_prevent_downgrades(packages)
         packages = additional_base_requirements_to_force_updates(packages)
         packages
       end
@@ -1093,9 +1093,9 @@ module Bundler
       current == proposed
     end
 
-    def additional_base_requirements_to_prevent_downgrades(resolution_packages, last_resolve)
+    def additional_base_requirements_to_prevent_downgrades(resolution_packages)
       return resolution_packages unless @locked_gems && !sources.expired_sources?(@locked_gems.sources)
-      converge_specs(@originally_locked_specs - last_resolve).each do |locked_spec|
+      converge_specs(@originally_locked_specs).each do |locked_spec|
         next if locked_spec.source.is_a?(Source::Path)
         resolution_packages.base_requirements[locked_spec.name] = Gem::Requirement.new(">= #{locked_spec.version}")
       end