diff --git a/lib/database_cleaner/active_record/deletion.rb b/lib/database_cleaner/active_record/deletion.rb
index 2eebdea..b95597f 100644
--- a/lib/database_cleaner/active_record/deletion.rb
+++ b/lib/database_cleaner/active_record/deletion.rb
@@ -27,7 +27,7 @@ module ActiveRecord
       end
     end
 
-    class PostgreSQLAdapter < POSTGRE_ADAPTER_PARENT
+    class PostgreSQLAdapter < POSTGRES_ADAPTER_PARENT
       def delete_table(table_name)
         execute("DELETE FROM #{quote_table_name(table_name)};")
       end