diff --git a/app/config/gimprc-unknown.c b/app/config/gimprc-unknown.c
index fa9d4f7256..4c5959d7ce 100644
--- a/app/config/gimprc-unknown.c
+++ b/app/config/gimprc-unknown.c
@@ -115,7 +115,11 @@ gimp_rc_add_unknown_token (GimpConfig  *config,
   token->key   = g_strdup (key);
   token->value = g_strdup (value);
 
-  if (!last)
+  if (last)
+    {
+      last = g_slist_last (g_slist_append (last, token));
+    }
+  else
     {
       unknown_tokens = g_slist_append (NULL, token);