diff --git a/lib/jrubyfx/dsl.rb b/lib/jrubyfx/dsl.rb
index <HASH>..<HASH> 100644
--- a/lib/jrubyfx/dsl.rb
+++ b/lib/jrubyfx/dsl.rb
@@ -83,7 +83,7 @@ module JRubyFX
       clazz = NAME_TO_CLASSES[fixed_name]
       unless clazz
         clazz = NAME_TO_CLASS_NAME[fixed_name]
-        clazz = (NAME_TO_CLASSES[fixed_name] = clazz.constantize_by) if clazz
+        clazz = (NAME_TO_CLASSES[fixed_name] = clazz.constantize) if clazz
       end
 
       unless clazz
Cannot find constantize_by anywhere?  analog_clock seemed to hit this so I changed to constantize