diff --git a/src/exchange/taler-exchange-httpd_refresh_reveal.c b/src/exchange/taler-exchange-httpd_refresh_reveal.c
index 14dd12ad2..bdf59c37b 100644
--- a/src/exchange/taler-exchange-httpd_refresh_reveal.c
+++ b/src/exchange/taler-exchange-httpd_refresh_reveal.c
@@ -399,9 +399,8 @@ refresh_reveal_transaction (void *cls,
     }
 
     /* Verify rc_expected matches rc */
-    if (0 != memcmp (&rctx->rc,
-                     &rc_expected,
-                     sizeof (struct TALER_RefreshCommitmentP)))
+    if (0 != GNUNET_memcmp (&rctx->rc,
+                            &rc_expected))
     {
       GNUNET_break_op (0);
       *mhd_ret = reply_refresh_reveal_missmatch (connection,