diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index 2557f38b26..8d80e536d1 100644
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -409,7 +409,7 @@ static int concat_read_close(AVFormatContext *avf)
 }
 
 #define MAX_ARGS 3
-#define NEEDS_UNSAFE   (1 << 1)
+#define NEEDS_UNSAFE   (1 << 0)
 #define NEEDS_FILE     (1 << 1)
 #define NEEDS_STREAM   (1 << 2)