diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 8b0100c88..a3c2e2ca2 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -2233,7 +2233,8 @@ struct TALER_EXCHANGEDB_Plugin
   (*create_tables)(void *cls);
 
   /**
-   * Change already present tables of the database to more partitions
+   * Change already present tables of the database to num partitions
+   * Only has an effect if there are default partitions only
    *
    * @param cls the @e cls of this struct with the plugin-specific state
    * @param num the number of partitions to create for each partitioned table