diff --git a/thumbnail.c b/thumbnail.c
index 9d057240564e35f48e2018f59722891c675f9c2f..912679ae7a6ed124f492396808d4c6c3faf244df 100644
--- a/thumbnail.c
+++ b/thumbnail.c
@@ -32,6 +32,7 @@ int main(int argc, char *argv[])
 	if (argc != 5)
 		return 1;
 	av_register_all();
+	avformat_network_init();
 	init_env();
 	init_avlogbuf();