diff --git a/lib/liquid/template.rb b/lib/liquid/template.rb
index a134962..e86dfb5 100644
--- a/lib/liquid/template.rb
+++ b/lib/liquid/template.rb
@@ -250,7 +250,7 @@ module Liquid
 
     def with_profiling
       if @profiling && !@options[:included]
-        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Profiler)
+        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
 
         @profiler = Profiler.new
         @profiler.start