diff --git a/src/auditor/taler-helper-auditor-wire.c b/src/auditor/taler-helper-auditor-wire.c
index bfc465b05..e3753b596 100644
--- a/src/auditor/taler-helper-auditor-wire.c
+++ b/src/auditor/taler-helper-auditor-wire.c
@@ -1629,8 +1629,11 @@ begin_debit_audit (void)
 static void
 conclude_credit_history (void)
 {
-  GNUNET_CONTAINER_multihashmap_destroy (in_map);
-  in_map = NULL;
+  if (NULL != in_map)
+  {
+    GNUNET_CONTAINER_multihashmap_destroy (in_map);
+    in_map = NULL;
+  }
   /* credit done, now check debits */
   begin_debit_audit ();
 }