1 files changed, 8 insertions, 1 deletions
diff --git a/spec/ruby/language/undef_spec.rb b/spec/ruby/language/undef_spec.rb
index 4e473b803f..29dba4afb4 100644
--- a/spec/ruby/language/undef_spec.rb
+++ b/spec/ruby/language/undef_spec.rb
@@ -38,12 +38,19 @@ describe "The undef keyword" do
       -> { @obj.meth(5) }.should raise_error(NoMethodError)
     end
 
-    it "with a interpolated symbol" do
+    it "with an interpolated symbol" do
       @undef_class.class_eval do
         undef :"#{'meth'}"
       end
       -> { @obj.meth(5) }.should raise_error(NoMethodError)
     end
+
+    it "with an interpolated symbol when interpolated expression is not a String literal" do
+      @undef_class.class_eval do
+        undef :"#{'meth'.to_sym}"
+      end
+      -> { @obj.meth(5) }.should raise_error(NoMethodError)
+    end
   end
 
   it "allows undefining multiple methods at a time" do