diff --git a/src/lib/test_taler_exchange_wirewatch.c b/src/lib/test_taler_exchange_wirewatch.c
index 3a7b40097..23baca578 100644
--- a/src/lib/test_taler_exchange_wirewatch.c
+++ b/src/lib/test_taler_exchange_wirewatch.c
@@ -148,6 +148,7 @@ main (int argc,
     };
 
     conn = GNUNET_PQ_connect ("postgres:///talercheck",
+                              NULL,
                               es,
                               NULL);
     if (NULL == conn)