1 files changed, 6 insertions, 1 deletions
diff --git a/lib/rubygems/install_update_options.rb b/lib/rubygems/install_update_options.rb
index 5c7289426e..0d0f0dc211 100644
--- a/lib/rubygems/install_update_options.rb
+++ b/lib/rubygems/install_update_options.rb
@@ -179,6 +179,11 @@ module Gem::InstallUpdateOptions
                "Suggest alternates when gems are not found") do |v,_o|
       options[:suggest_alternate] = v
     end
+
+    add_option(:"Install/Update", "--target-rbconfig [FILE]",
+                "rbconfig.rb for the deployment target platform") do |v, _o|
+      Gem.set_target_rbconfig(v)
+    end
   end
 
   ##
@@ -186,7 +191,7 @@ module Gem::InstallUpdateOptions
 
   def install_update_options
     {
-      :document => %w[ri],
+      document: %w[ri],
     }
   end