diff --git a/gio/tests/gapplication.c b/gio/tests/gapplication.c
index b7138cfba..2e0ea9d01 100644
--- a/gio/tests/gapplication.c
+++ b/gio/tests/gapplication.c
@@ -70,6 +70,8 @@ spawn (const gchar *expected_stdout,
   g_ptr_array_add (array, NULL);
   args = (gchar **) g_ptr_array_free (array, FALSE);
 
+  va_end (ap);
+
   data = g_slice_new (ChildData);
   data->expected_stdout = expected_stdout;