diff --git a/glib/gmain.c b/glib/gmain.c
index 41f1370d7..ee23a6519 100644
--- a/glib/gmain.c
+++ b/glib/gmain.c
@@ -585,7 +585,6 @@ g_main_context_unref (GMainContext *context)
       source = s_iter->data;
       g_source_destroy_internal (source, context, TRUE);
     }
-  UNLOCK_CONTEXT (context);
 
   for (sl_iter = context->source_lists; sl_iter; sl_iter = sl_iter->next)
     {
@@ -596,6 +595,7 @@ g_main_context_unref (GMainContext *context)
 
   g_hash_table_destroy (context->sources);
 
+  UNLOCK_CONTEXT (context);
   g_mutex_clear (&context->mutex);
 
   g_ptr_array_free (context->pending_dispatches, TRUE);