1 files changed, 2 insertions, 1 deletions
diff --git a/lib/bundler/plugin/dsl.rb b/lib/bundler/plugin/dsl.rb
index 4a3663fd..f65054f0 100644
--- a/lib/bundler/plugin/dsl.rb
+++ b/lib/bundler/plugin/dsl.rb
@@ -4,6 +4,7 @@ module Bundler
   # Dsl to parse the Gemfile looking for plugins to install
   module Plugin
     class DSL < Bundler::Dsl
+      class PluginGemfileError < PluginError; end
       alias_method :_gem, :gem # To use for plugin installation as gem
 
       # So that we don't have to override all there methods to dummy ones
@@ -21,7 +22,7 @@ module Bundler
       end
 
       def method_missing(name, *args)
-        super unless Bundler::Dsl.instance_methods.include? name
+        raise PluginGemfileError, "Undefined local variable or method `#{name}' for Gemfile" unless Bundler::Dsl.method_defined? name
       end
     end
   end