diff --git a/include/sqlpp11/transaction.h b/include/sqlpp11/transaction.h
index 317c3483..0ca3073f 100644
--- a/include/sqlpp11/transaction.h
+++ b/include/sqlpp11/transaction.h
@@ -69,7 +69,7 @@ namespace sqlpp
 
     ~transaction_t()
     {
-      if (not _finished)
+      if (!_finished)
       {
         try
         {