diff --git a/lib/usesguid/active_record_extensions.rb b/lib/usesguid/active_record_extensions.rb
index 246be3a..9192fc8 100644
--- a/lib/usesguid/active_record_extensions.rb
+++ b/lib/usesguid/active_record_extensions.rb
@@ -31,7 +31,7 @@ def usesguid(options = {})
         class_eval do
           set_primary_key options[:column] if options[:column]
           
-          before_create :assign_guid
+          before_validation :assign_guid
 
           # Give this record a guid id.  Public method so people can call it before save if necessary.
           def assign_guid
@@ -49,4 +49,4 @@ def assign_guid
     end
     
   end
-end
\ No newline at end of file
+end