diff --git a/channels/rdpsnd/pulse/rdpsnd_pulse.c b/channels/rdpsnd/pulse/rdpsnd_pulse.c
index 1a331f09e..0fcedef94 100644
--- a/channels/rdpsnd/pulse/rdpsnd_pulse.c
+++ b/channels/rdpsnd/pulse/rdpsnd_pulse.c
@@ -452,7 +452,9 @@ static void rdpsnd_pulse_start(rdpsndDevicePlugin* device)
 	if (!pulse->stream)
 		return;
 
+	pa_threaded_mainloop_lock(pulse->mainloop);
 	pa_stream_trigger(pulse->stream, NULL, NULL);
+	pa_threaded_mainloop_unlock(pulse->mainloop);
 }
 
 int FreeRDPRdpsndDeviceEntry(PFREERDP_RDPSND_DEVICE_ENTRY_POINTS pEntryPoints)