diff --git a/akonadi.spec b/akonadi.spec
index be98fbe..7512c81 100644
--- a/akonadi.spec
+++ b/akonadi.spec
@@ -1,4 +1,7 @@
 
+## can be Can be either MYSQL(default), POSTGRES or SQLITE
+#global database_backend MYSQL 
+
 Summary: PIM Storage Service
 Name:    akonadi
 Version: 1.5.2
@@ -73,6 +76,7 @@ mkdir -p %{_target_platform}
 pushd %{_target_platform}
 %{cmake} \
   -DCONFIG_INSTALL_DIR=%{_sysconfdir} \
+  %{?database_backend:-DDATABASE_BACKEND=%{database_backend}} \
   ..
 popd