diff --git a/db/migrate/20091021024908_modify_text_types.rb b/db/migrate/20091021024908_modify_text_types.rb
index 04ede3f4..6bf0c01c 100644
--- a/db/migrate/20091021024908_modify_text_types.rb
+++ b/db/migrate/20091021024908_modify_text_types.rb
@@ -1,6 +1,8 @@
 class ModifyTextTypes < ActiveRecord::Migration
   def self.up
-    change_column :revisions, :content, :text, :limit => 16777215
+    unless adapter_name.eql?('PostgreSQL')
+      change_column :revisions, :content, :text, :limit => 16777215
+    end
     change_column :pages, :name, :string, :limit => 255
     change_column :webs, :additional_style, :text
   end