diff --git a/src/gst/gstpipewiresink.c b/src/gst/gstpipewiresink.c
index 3ce1092d1..8a6541615 100644
--- a/src/gst/gstpipewiresink.c
+++ b/src/gst/gstpipewiresink.c
@@ -563,7 +563,7 @@ static gboolean
 gst_pipewire_sink_setcaps (GstBaseSink * bsink, GstCaps * caps)
 {
   GstPipeWireSink *pwsink;
-  GPtrArray *possible;
+  g_autoptr(GPtrArray) possible = NULL;
   enum pw_stream_state state;
   const char *error = NULL;
   gboolean res = FALSE;
@@ -658,7 +658,6 @@ start_error:
   {
     GST_ERROR ("could not start stream: %s", error);
     pw_thread_loop_unlock (pwsink->core->loop);
-    g_ptr_array_unref (possible);
     return FALSE;
   }
 }