diff --git a/Source/GSSocketStream.m b/Source/GSSocketStream.m
index 162f4a677..192d90896 100644
--- a/Source/GSSocketStream.m
+++ b/Source/GSSocketStream.m
@@ -279,7 +279,7 @@ static gnutls_anon_client_credentials_t anoncred;
   [self bye];
   gnutls_db_remove_session (session);
   gnutls_deinit (session);
-  gnutls_certificate_free_credentials (&certcred);
+  gnutls_certificate_free_credentials (certcred);
   [super dealloc];
 }