diff --git a/src/modules/oss/module-oss.c b/src/modules/oss/module-oss.c
index 79cbf67ab..da9245aed 100644
--- a/src/modules/oss/module-oss.c
+++ b/src/modules/oss/module-oss.c
@@ -877,7 +877,7 @@ static void thread_func(void *userdata) {
 
 /*        pa_log("loop");    */
 
-        if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
+        if (u->sink && PA_SINK_IS_OPENED(u->sink->thread_info.state))
             if (u->sink->thread_info.rewind_requested)
                 pa_sink_process_rewind(u->sink, 0);