diff --git a/sesman/chansrv/sound.c b/sesman/chansrv/sound.c
index 4fd1b35a..401363ce 100644
--- a/sesman/chansrv/sound.c
+++ b/sesman/chansrv/sound.c
@@ -1351,6 +1351,7 @@ sound_deinit(void)
 #endif
 
     fifo_delete(g_in_fifo, NULL);
+    g_in_fifo = NULL;
 
     return 0;
 }