diff --git a/main/channel.c b/main/channel.c
index 2cb3b7be38..d148cd97d5 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -1560,9 +1560,13 @@ static int generator_force(const void *data)
 	ast_channel_lock(chan);
 	tmp = chan->generatordata;
 	chan->generatordata = NULL;
-	generate = chan->generator->generate;
+	if (chan->generator)
+		generate = chan->generator->generate;
 	ast_channel_unlock(chan);
 
+	if (!tmp || !generate)
+		return 0;
+
 	res = generate(chan, tmp, 0, 160);
 
 	chan->generatordata = tmp;